diff --git a/data/nearstars.stc b/data/nearstars.stc index ad13fbde..aed9b3e3 100644 --- a/data/nearstars.stc +++ b/data/nearstars.stc @@ -2,18 +2,20 @@ # to Celestia's stars.dat. # Because the RECONS survey tabulation has not been updated since 2010, -# the data mostly comes from the SIMBAD database, with most parallaxes -# coming from Gaia DR2. Gaia DR2 does not provide parallaxes for the brightest +# the data mostly comes from the SIMBAD database, as well as "The 10 parsec +# sample in the Gaia era" table (https://gruze.org/10pc/). Most parallaxes +# come from Gaia EDR3, which does not provide parallaxes for the brightest # stars, so for those the Hipparcos parallaxes have been used. In some cases -# where Gaia DR2 parallaxes exist for one of the component stars, that has been -# used; if two or more components have them, the average of the derived distances -# have been used. +# where Gaia EDR3 parallaxes exist for one of the component stars, those have +# been used; if two or more components have them, the weighted mean of the +# parallaxes has been used. # Most brown dwarfs in this file do not have Gaia parallaxes, in which case the -# parallax comes from Martin et al. (2018), ApJ 867 (2), 109 -# "Y Dwarf Trigonometric Parallaxes from the Spitzer Space Telescope" -# https://arxiv.org/abs/1809.06479 -# Other sources are appear as comments for individual star systems. +# parallax comes from Kirkpatrick et al. (2021), ApJS 253 (1), 7 +# "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of +# 525 L, T, and Y Dwarfs" +# https://iopscience.iop.org/article/10.3847/1538-4365/abd107 +# Other sources appear as comments for individual star systems. # Because the magnitude system breaks down for extremely dim stars (such as late # T or Y dwarfs), they have been given an arbitrary but extremely low AbsMag @@ -21,7 +23,7 @@ # radius, if their radii are not known. # Orbits are taken from the Sixth Catalog of Orbits of Visual Binary Stars -# (http://ad.usno.navy.mil/wds/orb6.html), with other sources in the comments +# (http://www.astro.gsu.edu/wds/orb6.html), with other sources in the comments # below. # For binary orbits, the direction of an orbit's node on the plane of the @@ -61,19 +63,21 @@ Barycenter "Solar System Barycenter:SSB" 70890 # Proxima Cen { - RA 217.42893801 - Dec -62.67949189 - Distance 4.2441 # 768.5004 +/- 0.2030 mas + RA 217.39232147 + Dec -62.67607512 + Distance 4.2465 # 768.0665 +/- 0.0499 mas SpectralType "M5.5Ve" AppMag 11.09 } -# Distance from the same source as orbits +# Akeson et al. (2021), AJ 162 (1), 14 +# "Precision Millimeter Astrometry of the α Centauri AB System" +# https://iopscience.iop.org/article/10.3847/1538-3881/abfaff Barycenter "ALF Cen:Gliese 559" { - RA 219.8993053 # mass ratio 1.133:0.972 - Dec -60.8356249 - Distance 4.3897 # 743 +/- 1.3 mas + RA 219.85892215 + Dec -60.83163195 + Distance 4.3441 # 750.81 +/- 0.38 mas } 71683 # ALF Cen A @@ -81,16 +85,17 @@ Barycenter "ALF Cen:Gliese 559" OrbitBarycenter "ALF Cen" SpectralType "G2V" AppMag 0.01 + Radius 847000 EllipticalOrbit { # fully specified orientation - Period 79.91 - SemiMajorAxis 10.68 # mass ratio 1.133:0.972 - Eccentricity 0.52 - Inclination 82.61 - AscendingNode 231.75 - ArgOfPericenter 280.23 - MeanAnomaly 199.75 - } + Period 79.762 + SemiMajorAxis 10.66 # mass ratio 1.0788:0.9092 + Eccentricity 0.51947 + Inclination 82.33 + AscendingNode 231.87 + ArgOfPericenter 279.48 + MeanAnomaly 200.56 + } } 71681 # ALF Cen B @@ -98,23 +103,24 @@ Barycenter "ALF Cen:Gliese 559" OrbitBarycenter "ALF Cen" SpectralType "K1V" AppMag 1.33 + Radius 597700 EllipticalOrbit { # fully specified orientation - Period 79.91 - SemiMajorAxis 12.79 # mass ratio 1.133:0.972 - Eccentricity 0.52 - Inclination 82.61 - AscendingNode 231.75 - ArgOfPericenter 100.23 - MeanAnomaly 199.75 + Period 79.762 + SemiMajorAxis 12.64 # mass ratio 1.0788:0.9092 + Eccentricity 0.51947 + Inclination 82.33 + AscendingNode 231.87 + ArgOfPericenter 99.48 + MeanAnomaly 200.56 } } 87937 # Barnard's Star { - RA 269.45208250 - Dec 4.69336427 - Distance 5.9577 # 547.4506 +/- 0.2899 mas + RA 269.44850253 + Dec 4.73942005 + Distance 5.9629 # 546.9759 +/- 0.0401 mas SpectralType "M4V" AppMag 9.511 } @@ -122,10 +128,18 @@ Barycenter "ALF Cen:Gliese 559" # Lazorenko & Sahlmann (2018), A&A 618, A111 # "Updated astrometry and masses of the LUH 16 brown dwarf binary" # https://arxiv.org/abs/1808.07835 +# Magnitudes from Boffin et al. (2014), A&A 561, L4 +# "Possible astrometric discovery of a substellar companion to the closest +# binary brown dwarf system WISE J104915.57-531906.1" +# https://www.aanda.org/articles/aa/full_html/2014/01/aa22975-13/aa22975-13.html +# Rotation periods from Apai, Nardiello & Bedin (2021), ApJ 906 (1), 64 +# "TESS Observations of the Luhman 16 AB Brown Dwarf System: Rotational Periods, +# Lightcurve Evolution, and Zonal Circulation" +# https://iopscience.iop.org/article/10.3847/1538-4357/abcb97 Barycenter "Luhman 16:WISE 1049-5319:WISE J104915.57-531906.1" { - RA 162.328812 - Dec -53.319467 + RA 162.30328243 + Dec -53.31757381 Distance 6.5029 # 501.557 +/- 0.082 mas } @@ -133,64 +147,67 @@ Barycenter "Luhman 16:WISE 1049-5319:WISE J104915.57-531906.1" { OrbitBarycenter "Luhman 16" SpectralType "L7.5" - AbsMag 23 # for approximate radius in Celestia + AppMag 23.25 + Radius 70000 # approx. EllipticalOrbit { # fully specified orientation Period 27.54 - SemiMajorAxis 1.64 # mass ratio 33.51J:28.55J - Eccentricity 0.34 + SemiMajorAxis 1.636 # mass ratio 33.51J:28.55J + Eccentricity 0.343 Inclination 135.69 AscendingNode 118.66 ArgOfPericenter 136.22 MeanAnomaly 127.58 } + + RotationPeriod 6.94 } "Luhman 16 B:WISE 1049-5319 B:WISE J104915.57-531906.1 B" { OrbitBarycenter "Luhman 16" SpectralType "T0.5" - AbsMag 24 # for approximate radius in Celestia + AppMag 24.07 + Radius 63000 # approx. EllipticalOrbit { # fully specified orientation Period 27.54 - SemiMajorAxis 1.92 # mass ratio 33.51J:28.55J - Eccentricity 0.34 + SemiMajorAxis 1.921 # mass ratio 33.51J:28.55J + Eccentricity 0.343 Inclination 135.69 AscendingNode 118.66 ArgOfPericenter 316.22 MeanAnomaly 127.58 } + + RotationPeriod 5.28 } +# parameters from Kirkpatrick et al. (2021) "WISE 0855-0714:WISE J085510.83-071442.5" { - RA 133.795125 - Dec -7.2451389 - Distance 7.264 # 449 +/- 8 mas + RA 133.780984 + Dec -7.243932 + Distance 7.430 # 439.0 +/- 2.4 mas SpectralType "Y4" Radius 60000 # approx. AbsMag 40 # extremely low } -# Parallax from Weinberger, et al. (2016), AJ 152 (1), 24 -# "Trigonometric Parallaxes and Proper Motions of 134 Southern Late M, L, -# and T Dwarfs from the Carnegie Astrometric Planet Search Program" -# http://iopscience.iop.org/article/10.3847/0004-6256/152/1/24 "CN Leo:Gliese 406:Wolf 359" { - RA 164.1201092 - Dec 7.014540 - Distance 7.8948 # 413.13 +/- 1.27 mas + RA 164.10319031 + Dec 7.00272694 + Distance 7.8558 # 415.1794 +/- 0.0684 mas SpectralType "M6V" AppMag 13.507 } 54035 # Lalande 21185 { - RA 165.83414166 - Dec 35.96988004 - Distance 8.3067 # 392.64 +/- 0.67 mas + RA 165.83095968 + Dec 35.94865303 + Distance 8.3044 # 392.7529 +/- 0.0321 mas SpectralType "M2V" AppMag 7.520 } @@ -211,10 +228,11 @@ Barycenter 32349 "Sirius:Alhabor:ALF CMa:9 CMa:Gliese 244:ADS 5423" OrbitBarycenter "Sirius" SpectralType "A1V" AppMag -1.46 + Radius 1192700 EllipticalOrbit { # fully specified orientation Period 50.1284 - SemiMajorAxis 9.13 # mass ratio 2.063:1.018 + SemiMajorAxis 6.53 # mass ratio 2.063:1.018 Eccentricity 0.59142 Inclination 97.01 AscendingNode 161.67 @@ -228,10 +246,11 @@ Barycenter 32349 "Sirius:Alhabor:ALF CMa:9 CMa:Gliese 244:ADS 5423" OrbitBarycenter "Sirius" SpectralType "DA2" AppMag 8.44 + Radius 5634 EllipticalOrbit { # fully specified orientation Period 50.1284 - SemiMajorAxis 10.65 # mass ratio 2.063:1.018 + SemiMajorAxis 13.25 # mass ratio 2.063:1.018 Eccentricity 0.59142 Inclination 97.01 AscendingNode 161.67 @@ -247,9 +266,9 @@ Barycenter 32349 "Sirius:Alhabor:ALF CMa:9 CMa:Gliese 244:ADS 5423" # https://arxiv.org/abs/1706.03979 Barycenter "Gliese 65:Luyten 726-8" { - RA 24.75626394 # mass ratio 0.1225:0.1195 - Dec -17.950491 - Distance 8.791 # 373.70 +/- 2.70 mas + RA 24.77161351 # mass ratio 0.1225:0.1195 + Dec -17.94799520 + Distance 8.728 # 373.70 +/- 2.70 mas } "BL Cet:Gliese 65 A:Luyten 726-8 A" @@ -260,16 +279,16 @@ Barycenter "Gliese 65:Luyten 726-8" Radius 114790 EllipticalOrbit { # fully specified orbit - Period 26.284 - SemiMajorAxis 2.72 # mass ratio 0.1225:0.1195 - Eccentricity 0.62 - Inclination 81.85 - AscendingNode 337.40 - ArgOfPericenter 346.32 + Period 26.284 + SemiMajorAxis 2.72 # mass ratio 0.1225:0.1195 + Eccentricity 0.6185 + Inclination 113.55 + AscendingNode 47.80 + ArgOfPericenter 357.54 MeanAnomaly 21.93 } - RotationPeriod 5.76 + RotationPeriod 5.832 } "UV Cet:Gliese 65 B:Luyten 726-8 B" @@ -282,57 +301,57 @@ Barycenter "Gliese 65:Luyten 726-8" EllipticalOrbit { # fully specified orbit Period 26.284 SemiMajorAxis 2.79 # mass ratio 0.1225:0.1195 - Eccentricity 0.62 - Inclination 81.85 - AscendingNode 337.40 - ArgOfPericenter 166.32 + Eccentricity 0.6185 + Inclination 113.55 + AscendingNode 47.80 + ArgOfPericenter 177.54 MeanAnomaly 21.93 } - RotationPeriod 5.52 + RotationPeriod 5.4432 } 92403 # Ross 154 { - RA 282.45568250 - Dec -23.83623710 - Distance 9.7035 # 336.1228 +/- 0.0641 mas + RA 282.45878902 + Dec -23.83709745 + Distance 9.7063 # 336.0266 +/- 0.0317 mas SpectralType "M3.5Ve" AppMag 10.495 } "HH And:Gliese 905:Ross 248" { - RA 355.47931716 - Dec 44.17745144 - Distance 10.2903 # 316.9558 +/- 0.1260 mas + RA 355.48001526 + Dec 44.17037570 + Distance 10.3057 # 316.4812 +/- 0.0444 mas SpectralType "M5.0V" AppMag 12.28 } 16537 # Eps Eri { - RA 53.23268735 - Dec -9.45825866 - Distance 10.489 # 310.94 +/- 0.16 mas + RA 53.22829342 + Dec -9.45816822 + Distance 10.5016 # 310.5773 +/- 0.1355 mas SpectralType "K2V" AppMag 3.73 } 114046 # Lacaille 9352 { - RA 346.46681439 - Dec -35.85307188 - Distance 10.7211 # 304.2190 +/- 0.0451 mas + RA 346.50391668 + Dec -35.84716421 + Distance 10.7241 # 304.1354 +/- 0.0200 mas SpectralType "M2V" AppMag 7.34 } 57548 # Ross 128 { - RA 176.93498695 - Dec 0.80455693 - Distance 11.0074 # 296.3073 +/- 0.0699 mas + RA 176.93768799 + Dec 0.79911997 + Distance 11.0074 # 296.3053 +/- 0.0302 mas SpectralType "M4V" AppMag 11.153 } @@ -342,8 +361,8 @@ Barycenter "Gliese 65:Luyten 726-8" # http://adsabs.harvard.edu/abs/2000A%26A...364..665S Barycenter "Gliese 866:Luyten 789-6" { - RA 339.6399000 - Dec -15.2999325 + RA 339.650693945 + Dec -15.28964705 Distance 11.109 # 293.6 +/- 0.9 mas } @@ -355,7 +374,7 @@ Barycenter "Gliese 866 A:Luyten 789-6 A" Period 2.2537 SemiMajorAxis 0.415 # mass ratio (0.1187:0.0930):0.1145 Eccentricity 0.439 - Inclination 89.43 + Inclination 89.43 AscendingNode 358.27 ArgOfPericenter 61.70 MeanAnomaly 243.55 @@ -371,8 +390,9 @@ Barycenter "Gliese 866 A:Luyten 789-6 A" EllipticalOrbit { Period 0.01037 # 3.786516 d SemiMajorAxis 0.01244 # to match period and mass ratio 0.1187:0.0930 - Inclination 90 # plane-of-sky inclination 116.5 deg - AscendingNode 2 # guess - to roughly match plane of B + Inclination 90 # plane-of-sky inclination 116.5 deg + AscendingNode 2 # guess - to roughly match plane of B + ArgOfPericenter 144 } } @@ -385,9 +405,9 @@ Barycenter "Gliese 866 A:Luyten 789-6 A" EllipticalOrbit { Period 0.01037 # 3.786516 d SemiMajorAxis 0.01589 # to match period and mass ratio 0.1187:0.0930 - Inclination 90 # guess - to match plane of B - AscendingNode 2 # guess - to match plane of B - ArgOfPericenter 180 + Inclination 90 # guess - to match plane of B + AscendingNode 2 # guess - to match plane of B + ArgOfPericenter 324 } } @@ -401,7 +421,7 @@ Barycenter "Gliese 866 A:Luyten 789-6 A" Period 2.2537 SemiMajorAxis 0.768 # mass ratio (0.1187:0.0930):0.1145 Eccentricity 0.439 - Inclination 89.43 + Inclination 89.43 AscendingNode 358.27 ArgOfPericenter 241.70 MeanAnomaly 243.55 @@ -414,9 +434,9 @@ Barycenter "Gliese 866 A:Luyten 789-6 A" # https://arxiv.org/abs/0806.4049 Barycenter "61 Cyg:Gliese 820:ADS 14636" { - RA 316.7273265 # mass ratio 0.690:0.605 - Dec 38.7459723 - Distance 11.402 + RA 316.75090091 # mass ratio 0.690:0.605 + Dec 38.76022325 # A: 285.9949 +/- 0.0599 mas + Distance 11.404 # B: 286.0054 +/- 0.0289 mas } 104214 "61 Cyg A:V1803 Cyg:Gliese 820 A:ADS 14636 A" @@ -428,7 +448,7 @@ Barycenter "61 Cyg:Gliese 820:ADS 14636" EllipticalOrbit { Period 618.7 - SemiMajorAxis 41.23 # mass ratio 0.69:0.605 + SemiMajorAxis 41.24 # mass ratio 0.69:0.605 Eccentricity 0.54 Inclination 101 AscendingNode 295 @@ -446,7 +466,7 @@ Barycenter "61 Cyg:Gliese 820:ADS 14636" EllipticalOrbit { Period 618.7 - SemiMajorAxis 47.02 # mass ratio 0.69:0.605 + SemiMajorAxis 47.03 # mass ratio 0.69:0.605 Eccentricity 0.54 Inclination 101 AscendingNode 295 @@ -455,6 +475,9 @@ Barycenter "61 Cyg:Gliese 820:ADS 14636" } } +# Orbit from Bond et al. (2018), Res. Notes AAS 2 (3), 147 +# "Final Hubble Space Telescope Astrometry of the Procyon Binary System" +# https://iopscience.iop.org/article/10.3847/2515-5172/aad9a4 # Parameters from Bond et al. (2015), ApJ 813 (2), 106 # "Hubble Space Telescope Astrometry of the Procyon System" # https://iopscience.iop.org/article/10.1088/0004-637X/813/2/106 @@ -462,7 +485,7 @@ Barycenter 37279 "Procyon:Elgomaisa:ALF CMi:10 CMi:Gliese 280:ADS 6251" { RA 114.82549791 Dec 5.22498756 - Distance 11.444 # 250.0 +/- 0.7 mas + Distance 11.444 # 285.0 +/- 0.7 mas } "Procyon A:Elgomaisa A:ALF CMi A:10 CMi A:Gliese 280 A:ADS 6251 A" @@ -472,12 +495,12 @@ Barycenter 37279 "Procyon:Elgomaisa:ALF CMi:10 CMi:Gliese 280:ADS 6251" AppMag 0.37 EllipticalOrbit { # fully specified orientation - Period 40.84 + Period 40.844 SemiMajorAxis 4.32 # mass ratio 1.478:0.592 - Eccentricity 0.40 - Inclination 42.58 - AscendingNode 25.26 - ArgOfPericenter 90.19 + Eccentricity 0.39799 + Inclination 42.60 + AscendingNode 25.19 + ArgOfPericenter 90.25 MeanAnomaly 281.41 } } @@ -485,16 +508,18 @@ Barycenter 37279 "Procyon:Elgomaisa:ALF CMi:10 CMi:Gliese 280:ADS 6251" "Procyon B:Elgomaisa B:ALF CMi B:10 CMi B:Gliese 280 B:ADS 6251 B" { OrbitBarycenter "Procyon" - SpectralType "DA" - AppMag 10.7 + SpectralType "DQZ" + Temperature 7740 + Radius 8571 + AppMag 10.82 EllipticalOrbit { # fully specified orientation - Period 40.84 - SemiMajorAxis 10.79 # mass ratio 1.478:0.592 - Eccentricity 0.40 - Inclination 42.58 - AscendingNode 25.26 - ArgOfPericenter 270.19 + Period 40.844 + SemiMajorAxis 10.80 # mass ratio 1.478:0.592 + Eccentricity 0.39799 + Inclination 42.60 + AscendingNode 25.19 + ArgOfPericenter 270.25 MeanAnomaly 281.41 } } @@ -505,9 +530,9 @@ Barycenter 37279 "Procyon:Elgomaisa:ALF CMi:10 CMi:Gliese 280:ADS 6251" # http://iopscience.iop.org/article/10.1088/0004-637X/804/1/64/meta Barycenter "Gliese 725:Struve 2398:ADS 11632" { - RA 280.6949398 # mass ratio 0.334:0.248 - Dec 59.6288903 - Distance 11.488 + RA 280.68307740 # mass ratio 0.334:0.248 + Dec 59.63698903 # A: 283.8401 +/- 0.0220 mas + Distance 11.491 # B: 283.8378 +/- 0.0287 mas } 91768 "Gliese 725 A:Struve 2398 A:ADS 11632 A" @@ -518,7 +543,7 @@ Barycenter "Gliese 725:Struve 2398:ADS 11632" EllipticalOrbit { Period 408 - SemiMajorAxis 20.83 # mass ratio 0.334:0.248 + SemiMajorAxis 20.84 # mass ratio 0.334:0.248 Eccentricity 0.53 Inclination 111.9 AscendingNode 146.1 @@ -550,9 +575,9 @@ Barycenter "Gliese 725:Struve 2398:ADS 11632" # https://arxiv.org/abs/1804.03476 Barycenter 1475 "Gliese 15:Groombridge 34:ADS 246" { - RA 4.600573040 # mass ratio 0.38:0.15 - Dec 44.02478402 - Distance 11.619 + RA 4.61664355 # mass ratio 0.38:0.15 + Dec 44.02590687 # A: 280.7068 +/- 0.0203 mas + Distance 11.619 # B: 280.6947 +/- 0.0278 mas } "GX And:Gliese 15 A:Groombridge 34 A:ADS 246 A" @@ -593,25 +618,25 @@ Barycenter 1475 "Gliese 15:Groombridge 34:ADS 246" "DX Cnc:GJ 1111:Giclas 51-15" { - RA 127.45563677 - Dec 26.77600744 - Distance 11.6780 # 279.2901 +/- 0.1345 mas + RA 127.45009240 + Dec 26.77328597 + Distance 11.6797 # 279.2496 +/- 0.0637 mas SpectralType "M6.5V" AppMag 14.81 } Barycenter "EPS Ind:Gliese 845" # orbit of A & B components unknown { - RA 330.87262069 # mass ratio 0.732:(0.0716:0.0669) - Dec -56.7854593 - Distance 11.870 + RA 330.90487220 # mass ratio 0.732:(0.0716:0.0669) + Dec -56.79670693 + Distance 11.853 } 108870 "EPS Ind A:Gliese 845 A" { - RA 330.84022596 - Dec -56.7859825 - Distance 11.8686 # 274.8048 +/- 0.2494 mas + RA 330.87240788 + Dec -56.79725466 + Distance 11.8670 # 274.8431 +/- 0.0956 mas SpectralType "K5V" AppMag 4.69 } @@ -621,8 +646,8 @@ Barycenter "EPS Ind:Gliese 845" # orbit of A & B components unknown # https://arxiv.org/abs/1807.09880 Barycenter "EPS Ind B:CI Ind:Gliese 845 B" { - RA 331.0438333 - Dec -56.782694 + RA 331.07645260 + Dec -56.79381207 Distance 11.780 # 276.88 +/- 0.81 mas } @@ -630,8 +655,9 @@ Barycenter "EPS Ind B:CI Ind:Gliese 845 B" { OrbitBarycenter "EPS Ind B" SpectralType "T1.5V" - Temperature 1280 - AbsMag 34.5 # for approx. radius in Celestia + Temperature 1320 + Radius 59000 + AppMag 24.12 EllipticalOrbit { Period 11.41 @@ -648,8 +674,8 @@ Barycenter "EPS Ind B:CI Ind:Gliese 845 B" { OrbitBarycenter "EPS Ind B" SpectralType "T6V" - Temperature 850 - Radius 60000 # approx. + Temperature 910 + Radius 61000 AbsMag 40 # extremely low EllipticalOrbit { @@ -665,76 +691,76 @@ Barycenter "EPS Ind B:CI Ind:Gliese 845 B" 8102 # Tau Cet { - RA 26.01701426 - Dec -15.93747960 - Distance 11.905 # 273.96 +/- 0.17 mas + RA 26.00905506 + Dec -15.93368020 + Distance 11.9118 # 273.8097 +/- 0.1701 mas SpectralType "G8V" AppMag 3.50 } "GJ 1061:Luyten 372-58" { - RA 53.99874864 - Dec -44.51270146 - Distance 11.9803 # 272.2446 +/- 0.0661 mas + RA 54.00339388 + Dec -44.51436232 + Distance 11.9839 # 272.1615 +/- 0.0316 mas SpectralType "M5.5V" AppMag 13.03 } 5643 # YZ Cet { - RA 18.12765323 - Dec -16.99898925 - Distance 12.1084 # 269.3628 +/- 0.0785 mas + RA 18.13325425 + Dec -16.99615487 + Distance 12.1222 # 269.0573 +/- 0.0337 mas SpectralType "M4.0Ve" AppMag 12.074 } 36208 # Luyten's Star { - RA 111.85208229 - Dec 5.22578699 - Distance 12.402 # 262.98 +/- 1.39 mas + RA 111.85462844 + Dec 5.20938270 + Distance 12.3485 # 264.1269 +/- 0.0413 mas SpectralType "M3.5V" AppMag 9.872 } "Teegarden's Star:SO0253+1652:SO025300.5+165258" { - RA 43.25371387 - Dec 16.88128947 - Distance 12.4957 # 261.0147 +/- 0.2690 mas + RA 43.26964248 + Dec 16.86437382 + Distance 12.4970 # 260.9884 +/- 0.0934 mas SpectralType "M7.0V" AppMag 15.40 } 24186 # Kapteyn's Star { - RA 77.91912216 - Dec -45.01843165 - Distance 12.8294 # 254.2263 +/- 0.0263 mas + RA 77.95993735 + Dec -45.04381270 + Distance 12.8308 # 254.1986 +/- 0.0168 mas SpectralType "M1VI" AppMag 8.853 } 105090 # Lacaille 8760 { - RA 319.31362024 - Dec -38.86736390 - Distance 12.9515 # 251.8295 +/- 0.0559 mas + RA 319.29501814 + Dec -38.87245640 + Distance 12.9472 # 251.9124 +/- 0.0352 mas SpectralType "M1V" AppMag 6.68 } -# used Gaia DR2 parallax for A +# Used Gaia EDR3 parallax for A # parameters from Vigan et al. (2012), A&A 540, A131 # "High-contrast spectroscopy of SCR J1845-6357 B" # https://www.aanda.org/articles/aa/abs/2012/04/aa18426-11/aa18426-11.html Barycenter "SCR 1845-6357" { - RA 281.27187786 - Dec -63.96318293 - Distance 13.0505 # 249.9187 +/- 0.1551 mas + RA 281.29804386 + Dec -63.96056737 + Distance 13.0638 # 249.6651 +/- 0.1330 mas } "SCR 1845-6357 A" @@ -764,8 +790,8 @@ Barycenter "SCR 1845-6357" Barycenter 110893 "Gliese 860:Kruger 60:ADS 15972" { - RA 336.9985152 # mass ratio 0.30:0.17 - Dec 57.69579262 # only used parallax of A + RA 336.99185002 # mass ratio 0.30:0.17 + Dec 57.69405691 # only used DR2 parallax of A Distance 13.0780 # 249.3926 +/- 0.1653 mas } @@ -805,22 +831,37 @@ Barycenter 110893 "Gliese 860:Kruger 60:ADS 15972" "DENIS 1048-3956:DENIS J104814.6-395606:RECONS 2" { - RA 162.06072261 - Dec -39.93523423 - Distance 13.1932 # 247.2157 +/- 0.1236 mas + RA 162.05388772 + Dec -39.93962595 + Distance 13.1932 # 247.2156 +/- 0.0512 mas SpectralType "M9V" AppMag 17.532 } +# parallax from Leggett et al. (2012), ApJ 748 (2), 74 +# "The Properties of the 500 K Dwarf UGPS J072227.51-054031.2 and a Study +# of the Far-red Flux of Cold Brown Dwarfs" +# https://iopscience.iop.org/article/10.1088/0004-637X/748/2/74 +"UGPS 0722-0540:UGPS J072227.51-054031.2" +{ + RA 110.6161250 + Dec -5.6753056 + Distance 13.433 # 242.8 +/- 2.40 mas + SpectralType "T9V" + Temperature 505 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + # masses and parallaxes from Benedict et al. (2016), AJ 152 (5), 141 # "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence # M Dwarfs" # http://iopscience.iop.org/article/10.3847/0004-6256/152/5/141/meta Barycenter 30920 "Gliese 234:Ross 614" { - RA 97.34746466 - Dec -2.81355664 - Distance 13.4239 # 242.9659 +/- 0.8833 mas + RA 97.35079477 + Dec -2.81713072 + Distance 13.533 # 241.0 +/- 0.4 mas } "V577 Mon:Gliese 234 A:Ross 614 A" @@ -831,7 +872,7 @@ Barycenter 30920 "Gliese 234:Ross 614" EllipticalOrbit { # fully specified orientation Period 16.63 - SemiMajorAxis 1.48 # mass ratio 0.223:0.109 + SemiMajorAxis 1.49 # mass ratio 0.223:0.109 Eccentricity 0.38 Inclination 93.87 AscendingNode 322.71 @@ -848,7 +889,7 @@ Barycenter 30920 "Gliese 234:Ross 614" EllipticalOrbit { # fully specified orientation Period 16.63 - SemiMajorAxis 3.02 # mass ratio 0.223:0.109 + SemiMajorAxis 3.05 # mass ratio 0.223:0.109 Eccentricity 0.38 Inclination 93.87 AscendingNode 322.71 @@ -857,28 +898,14 @@ Barycenter 30920 "Gliese 234:Ross 614" } } -# low-quality parallax from Theissen, C. A. (2018), ApJ 862 (2), 173 -# "Parallaxes of Cool Objects with WISE: Filling in for Gaia" -# http://iopscience.iop.org/article/10.3847/1538-4357/aaccfa/meta -"UGPS 0722-0540:UGPS J072227.51-054031.2" -{ - RA 110.6161250 - Dec -5.6753056 - Distance 13.433 # 242.8 +/- 2.40 mas - SpectralType "T9V" - Temperature 505 - Radius 60000 # approx. - AbsMag 40 # extremely low -} - # masses and parallaxes from Benedict et al. (2016), AJ 152 (5), 141 # "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence # M Dwarfs" # http://iopscience.iop.org/article/10.3847/0004-6256/152/5/141/meta Barycenter "Gliese 473:Wolf 424" { - RA 188.3223395 - Dec 9.0210534 + RA 188.31458052 # mass ratio 0.124:0.113 + Dec 9.02196651 Distance 13.850 # 235.5 +/- 2.9 mas } @@ -918,113 +945,106 @@ Barycenter "Gliese 473:Wolf 424" 80824 # Wolf 1061 { - RA 247.57524250 - Dec -12.66258979 - Distance 14.0458 # 232.2095 +/- 0.0630 mas + RA 247.57481416 + Dec -12.66785108 + Distance 14.0500 # 232.1390 +/- 0.0268 mas SpectralType "M3V" AppMag 10.072 } 3829 # van Maanen's Star { - RA 12.29124338 - Dec 5.38860920 - Distance 14.0744 # 231.7375 +/- 0.0380 mas + RA 12.29674025 + Dec 5.37655661 + Distance 14.0718 # 231.7800 +/- 0.0183 mas SpectralType "DZ7.5" AppMag 12.374 } 439 # Gliese 1 { - RA 1.35178251 - Dec -37.35736228 - Distance 14.1725 # 230.1331 +/- 0.0600 mas + RA 1.38328415 + Dec -37.36774403 + Distance 14.1747 # 230.0970 +/- 0.0362 mas SpectralType "M2V" AppMag 8.562 } -# parameters and low-quality parallax from Martin et al. (2018) -"WISE 1639-6847:WISE J163940.83-684738.6" -{ - RA 249.921736 - Dec -68.797280 - Distance 14.302 # 228.05 +/- 8.93 mas - SpectralType "Y0Vpec" - Temperature 370 # approx. - Radius 60000 # approx. - AbsMag 40 # extremely low -} - "TZ Ari:Gliese 83.1:GJ 9066:Luyten 1159-16" { - RA 30.05398414 - Dec 13.05195036 - Distance 14.5843 # 223.6349 +/- 0.1066 mas + RA 30.05898705 + Dec 13.04407120 + Distance 14.5780 # 223.7321 +/- 0.0699 mas SpectralType "M4.5V" AppMag 12.298 } -85523 # Gliese 674 -{ - RA 262.16643984 - Dec -46.89519257 - Distance 14.8387 # 219.8012 +/- 0.0487 mas - SpectralType "M3V" - AppMag 9.407 -} - 86162 # Gliese 687 { - RA 264.10791321 - Dec 68.33914004 - Distance 14.8401 # 219.7807 +/- 0.0324 mas + RA 264.10405257 + Dec 68.33349764 + Distance 14.8395 # 219.7898 +/- 0.0210 mas SpectralType "M3.0V" AppMag 9.15 } +85523 # Gliese 674 +{ + RA 262.17016392 + Dec -46.89910490 + Distance 14.8492 # 219.6463 +/- 0.0262 mas + SpectralType "M3V" + AppMag 9.407 +} + +# parameters from Kirkpatrick et al. (2021) +"WISE 1639-6847:WISE J163940.83-684738.6" +{ + RA 249.922582 + Dec -68.798903 + Distance 14.852 # 219.6 +/- 2.3 mas + SpectralType "Y0Vpec" + Temperature 412 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + "GJ 3622:LP 731-58" { - RA 162.05255937 - Dec -11.33600262 - Distance 14.8851 # 219.1159 +/- 0.1567 mas + RA 162.05518400 + Dec -11.34280332 + Distance 14.8706 # 219.3302 +/- 0.0602 mas SpectralType "M6.5V" AppMag 15.784 } 57367 # Luyten 145-141 { - RA 176.42882111 - Dec -64.84151780 - Distance 15.1182 # 215.7373 +/- 0.0324 mas + RA 176.45664662 + Dec -64.84305285 + Distance 15.1226 # 215.6753 +/- 0.0181 mas SpectralType "DQ6" AppMag 11.513 } -113020 # Gliese 876 -{ - RA 343.31971796 - Dec -14.26369539 - Distance 15.2504 # 213.8669 +/- 0.0758 mas - SpectralType "M3.5V" - AppMag 10.192 -} - +# Used Gaia EDR3 parallax for B # masses from Benedict et al. (2016), AJ 152 (5), 141 # "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence # M Dwarfs" # http://iopscience.iop.org/article/10.3847/0004-6256/152/5/141/meta -Barycenter "GJ 1245" # orbit of A & B components unknown +# orbit listed for A-B in Sixth Catalog yields unrealistically high mass sum +Barycenter "GJ 1245" { - RA 298.477317 # mass ratio (0.111:0.076):0.10 - Dec 44.415377 - Distance 15.268 + RA 298.48051408 # mass ratio (0.111:0.076):0.10 + Dec 44.41253085 + Distance 15.2001 # 214.5745 +/- 0.0476 mas } Barycenter "GJ 1245 A" { - RA 298.47700882 - Dec 44.41426155 - Distance 15.3029 # 213.1329 +/- 0.5737 mas + RA 298.47975909 + Dec 44.41233014 + Distance 15.2001 } "V1581 Cyg:GJ 1245 Aa" @@ -1035,7 +1055,7 @@ Barycenter "GJ 1245 A" EllipticalOrbit { Period 16.84 - SemiMajorAxis 1.53 # mass ratio 0.111:0.076 + SemiMajorAxis 1.56 # mass ratio 0.111:0.076 Eccentricity 0.33 Inclination 70.45 AscendingNode 37.06 @@ -1052,7 +1072,7 @@ Barycenter "GJ 1245 A" EllipticalOrbit { Period 16.84 - SemiMajorAxis 2.23 # mass ratio 0.111:0.076 + SemiMajorAxis 2.29 # mass ratio 0.111:0.076 Eccentricity 0.33 Inclination 70.45 AscendingNode 37.06 @@ -1063,98 +1083,136 @@ Barycenter "GJ 1245 A" "GJ 1245 B" { - RA 298.47974513 - Dec 44.41504008 - Distance 15.2034 # 214.5285 +/- 0.0824 mas + RA 298.48192590 + Dec 44.41290616 + Distance 15.2001 SpectralType "M6V" AppMag 13.99 } +# parallax from Kirkpatrick et al. (2019), ApJS 240 (2), 19 +# "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an +# Analysis of the Field Substellar Mass Function into the 'Planetary' Mass Regime" +# https://iopscience.iop.org/article/10.3847/1538-4365/aaf6af +# rotation period, radius from Burningham et al. (2016), MNRAS 463, 2 +# "A LOFAR mini-survey for low-frequency radio emission from the nearest brown dwarfs" +# https://academic.oup.com/mnras/article/463/2/2202/2892466 +"WISE 1741+2553:WISE J174124.25+255319.6" +{ + RA 265.352586 + Dec 25.892878 + Distance 15.220 # 214.3 +/- 2.8 mas + SpectralType "T9V" + Temperature 620 + Radius 60000 # approx. + AbsMag 40 # extremely low + RotationPeriod 2 +} + +113020 # Gliese 876 +{ + RA 343.32411100 + Dec -14.26668939 + Distance 15.2382 # 214.0380 +/- 0.0356 mas + SpectralType "M3.5V" + AppMag 10.192 +} + "GJ 3618:Luyten 143-23" { - RA 161.08847255 - Dec -61.20979537 - Distance 15.7703 # 206.8172 +/- 0.0735 mas + RA 161.08527551 + Dec -61.20263830 + Distance 15.7586 # 206.9698 +/- 0.0448 mas SpectralType "M5.0V" AppMag 13.920 } "GJ 1002" { - RA 1.67998846 - Dec -7.53806229 - Distance 15.8164 # 206.2134 +/- 0.1281 mas + RA 1.67635043 + Dec -7.54647533 + Distance 15.8060 # 206.3500 +/- 0.0474 mas SpectralType "M5.5V" Radius 122000 # approx. for class AppMag 13.837 } +"DENIS 0255-4700:DENIS-P J025503.5-470050:2MASS 0255-4700:2MASS J02550357-4700509" +{ + RA 43.77198593 + Dec -47.01672836 + Distance 15.8771 # 205.4251 +/- 0.1857 mas + SpectralType "L9V" + Radius 60000 # approx. + AppMag 22.921 +} + +49908 # Groombridge 1618 +{ + RA 152.83292896 + Dec 49.45198890 + Distance 15.8857 # 205.3148 +/- 0.0224 mas + SpectralType "K6Ve" + AppMag 6.61 +} + # masses from Mann et al. (2015), ApJ 804 (1), 64 # "How to Constrain Your M Dwarf: Measuring Effective Temperature, # Bolometric Luminosity, Mass, and Radius" # http://iopscience.iop.org/article/10.1088/0004-637X/804/1/64/meta Barycenter 54211 "Gliese 412:Lalande 21258" # orbits of A & B unknown { - RA 166.3709615 # mass ratio 0.39:0.0952 - Dec 43.52576672 - Distance 15.846 + RA 166.34402770 # mass ratio 0.39:0.0952 + Dec 43.52995949 + Distance 15.9977 } "Gliese 412 A:Lalande 21258 A" { - RA 166.36907492 - Dec 43.52677540 - Distance 15.812 # 206.27 +/- 1.00 mas + RA 166.34205974 + Dec 43.53094856 + Distance 15.9969 # 203.8876 +/- 0.0332 mas SpectralType "M1.0Ve" AppMag 8.780 } "WX UMa:Gliese 412 B:Lalande 21258 B" { - RA 166.37869018 - Dec 43.52163453 - Distance 15.9834 # 204.0592 +/- 0.1687 mas + RA 166.35208968 + Dec 43.52590762 + Distance 16.0012 # 203.8323 +/- 0.0500 mas SpectralType "M6.0V" AppMag 14.45 } -49908 # Groombridge 1618 +1001741423 "AD Leo:Gliese 388" { - RA 152.84225009 - Dec 49.45423588 - Distance 15.8797 # 205.3917 +/- 0.0342 mas - SpectralType "K6Ve" - AppMag 6.61 -} - -"DENIS 0255-4700:DENIS-P J025503.5-470050:2MASS 0255-4700:2MASS J02550357-4700509" -{ - RA 43.76539377 - Dec -47.01426260 - Distance 15.8847 # 205.3266 +/- 0.2545 mas - SpectralType "L9V" - Radius 60000 # approx. - AppMag 22.921 + RA 154.89881370 + Dec 19.86980991 + Distance 16.1939 # 201.4064 +/- 0.0296 mas + SpectralType "M4Vae" + Radius 180000 # approx. for class + AppMag 9.52 } 106440 # Gliese 832 { - RA 323.39156247 - Dec -49.00900096 - Distance 16.1939 # 201.4073 +/- 0.0429 mas + RA 323.39125188 + Dec -49.01263040 + Distance 16.2005 # 201.3252 +/- 0.0237 mas SpectralType "M2V" Radius 306000 # approx. for class AppMag 8.672 } -1001741423 "AD Leo:Gliese 388" +86214 # Gliese 682 { - RA 154.90117001 - Dec 19.87000390 - Distance 16.1970 # 201.3683 +/- 0.0679 mas - SpectralType "M4Vae" + RA 264.26088739 + Dec -44.32338224 + Distance 16.3328 # 199.6944 +/- 0.0312 mas + SpectralType "M3.5V" Radius 180000 # approx. for class - AppMag 9.52 + AppMag 10.946 } # mass of component A from Ma et al. (2018), MNRAS 480 (2), 2411 @@ -1163,25 +1221,25 @@ Barycenter 54211 "Gliese 412:Lalande 21258" # orbits of A & B unknown # https://arxiv.org/abs/1807.07098 Barycenter 19849 "Keid:OMI2 Eri:40 Eri:Gliese 166:ADS 3093" # Orbits of A & (BC) unknown { - RA 63.82884851 # mass ratio 0.78:(0.573:0.2036) - Dec -7.654310215 - Distance 16.305 + RA 63.81919733 # mass ratio 0.78:(0.573:0.2036) + Dec -7.67024168 + Distance 16.3399 } "Keid A:OMI2 Eri A:40 Eri A:Gliese 166 A:ADS 3093 A" { - RA 63.81799886 - Dec -7.65287169 - Distance 16.257 # 200.62 +/- 0.23 mas + RA 63.80795301 + Dec -7.66807782 + Distance 16.3398 # 199.6080 +/- 0.1208 mas SpectralType "K0V" AppMag 4.43 } Barycenter "Keid BC:OMI2 Eri BC:40 Eri BC:Gliese 166 BC" { - RA 63.83974566 - Dec -7.65575504 - Distance 16.3523 # 199.4552 mas + RA 63.83049088 # mass ratio 0.573:0.2036 + Dec -7.67241502 # B: 199.6911 +/- 0.0512 mas + Distance 16.340 # C: 199.4516 +/- 0.0692 mas } # radius from Bond et al. (2017), ApJ 848 (1), 16 @@ -1197,7 +1255,7 @@ Barycenter "Keid BC:OMI2 Eri BC:40 Eri BC:Gliese 166 BC" EllipticalOrbit { Period 222.74 - SemiMajorAxis 8.855 # mass ratio 0.573:0.2036 + SemiMajorAxis 9.17 # mass ratio 0.573:0.2036 Eccentricity 0.451 Inclination 83.57 AscendingNode 216.91 @@ -1215,7 +1273,7 @@ Barycenter "Keid BC:OMI2 Eri BC:40 Eri BC:Gliese 166 BC" EllipticalOrbit { Period 222.74 - SemiMajorAxis 24.92 # mass ratio 0.573:0.2036 + SemiMajorAxis 25.82 # mass ratio 0.573:0.2036 Eccentricity 0.451 Inclination 83.57 AscendingNode 216.91 @@ -1224,21 +1282,11 @@ Barycenter "Keid BC:OMI2 Eri BC:40 Eri BC:Gliese 166 BC" } } -86214 # Gliese 682 -{ - RA 264.26527385 - Dec -44.31921360 - Distance 16.3320 # 199.7031 +/- 0.0832 mas - SpectralType "M3.5V" - Radius 180000 # approx. for class - AppMag 10.946 -} - 112460 # EV Lac { - RA 341.70721323 - Dec 44.33399228 - Distance 16.4716 # 198.0112 +/- 0.0380 mas + RA 341.70282545 + Dec 44.33195332 + Distance 16.4761 # 197.9573 +/- 0.0220 mas SpectralType "M4.0V" Radius 225000 # approx. for class AppMag 10.26 @@ -1249,9 +1297,9 @@ Barycenter "Keid BC:OMI2 Eri BC:40 Eri BC:Gliese 166 BC" # https://www.aanda.org/articles/aa/abs/2008/17/aa8624-07/aa8624-07.html Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" { - RA 271.36368827 - Dec 2.50009883 - Distance 16.580 # 196.72 +/- 0.83 mas + RA 271.36511072 # mass ratio 0.89:0.73 + Dec 2.49476206 # A: 195.5674 +/- 0.1964 mas + Distance 16.668 # B: 195.8563 +/- 0.2535 mas } 1052130434 "70 Oph A:Gliese 702 A:Struve 2272 A:ADS 11046 A" @@ -1262,7 +1310,7 @@ Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" EllipticalOrbit { # fully specified orientation Period 88.44 - SemiMajorAxis 10.37 # mass ratio 0.89:0.73 + SemiMajorAxis 10.42 # mass ratio 0.89:0.73 Eccentricity 0.50 Inclination 28.75 AscendingNode 73.59 @@ -1271,7 +1319,7 @@ Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" } } -1052120434 "70 Oph B:Gliese 702 B:Struve 2272 B:ADS 11046 B" +1052120434 "70 Oph B:V2391 Oph:Gliese 702 B:Struve 2272 B:ADS 11046 B" { OrbitBarycenter "70 Oph" SpectralType "K4V" @@ -1279,7 +1327,7 @@ Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" EllipticalOrbit { # fully specified orientation Period 88.44 - SemiMajorAxis 12.64 # mass ratio 0.89:0.73 + SemiMajorAxis 12.71 # mass ratio 0.89:0.73 Eccentricity 0.50 Inclination 28.75 AscendingNode 73.59 @@ -1295,7 +1343,7 @@ Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" { RA 297.69582730 Dec 8.86832120 - Distance 16.730 # 194.95 +/- 0.57 + Distance 16.730 # 194.95 +/- 0.57 mas SpectralType "A7IV" AppMag 0.76 Radius 1396700 # equatorial radius @@ -1313,12 +1361,11 @@ Barycenter 88601 "70 Oph:Gliese 702:Struve 2272:ADS 11046" # Orbit from Tokovinin et al. (2020), AJ 160 (1), 7 # "Speckle Interferometry at SOAR in 2019" # https://arxiv.org/abs/2005.05305 -# Distance from average of distances from Gaia DR2 parallax for A and B Barycenter "GJ 1116" { - RA 134.56295790 # mass ratio 0.11:0.10 - Dec 19.76308611 # A: 194.7225 +/- 0.1251 mas - Distance 16.735 # B: 195.0836 +/- 0.1754 mas + RA 134.55895246 # mass ratio 0.11:0.10 + Dec 19.76277843 # A: 194.1443 +/- 0.1228 mas + Distance 16.749 # B: 196.2619 +/- 0.1976 mas } "EI Cnc:GJ 1116 A" @@ -1329,7 +1376,7 @@ Barycenter "GJ 1116" EllipticalOrbit { Period 134.4 - SemiMajorAxis 7.902 # mass ratio 0.11:0.10 + SemiMajorAxis 7.91 # mass ratio 0.11:0.10 Eccentricity 0.661 Inclination 84.9 AscendingNode 59.9 @@ -1346,7 +1393,7 @@ Barycenter "GJ 1116" EllipticalOrbit { Period 134.4 - SemiMajorAxis 8.692 # mass ratio 0.11:0.10 + SemiMajorAxis 8.70 # mass ratio 0.11:0.10 Eccentricity 0.661 Inclination 84.9 AscendingNode 59.9 @@ -1361,9 +1408,9 @@ Barycenter "GJ 1116" # https://academic.oup.com/mnras/article/463/2/2202/2892466 "WISE 1506+7027:WISE J150649.97+702736.1" { - RA 226.71850107 - Dec 70.45697728 - Distance 16.8516 # 193.5457 +/- 0.9420 mas + RA 226.70263615 + Dec 70.46161913 + Distance 16.8173 # 193.9412 +/- 0.6277 mas AppMag 17.48 # calculated from J, H, and Ks bands SpectralType "T6" Radius 60000 # approx. @@ -1373,28 +1420,28 @@ Barycenter "GJ 1116" 1006050134 "GJ 3379:Giclas 99-49" { - RA 90.01459942 - Dec 2.70655466 - Distance 16.9813 # 192.0675 +/- 0.0715 mas + RA 90.01597644 + Dec 2.70637408 + Distance 16.9861 # 192.0135 +/- 0.0310 mas SpectralType "M3.5Ve" Radius 225000 # approx. for class AppMag 11.31 } -"WISE J0817-6155:WISEP J081729.74-615504.1" +"WISE 0817-6155:WISEP J081729.74-615504.1" { - RA 124.37499532 - Dec -61.92101733 - Distance 17.0290 # 191.5301 +/- 0.6037 mas + RA 124.37351806 + Dec -61.91613022 + Distance 17.0018 # 191.8362 +/- 0.4186 mas SpectralType "T6V" AbsMag 34 # for approximate radius in Celestia } 57544 # Gliese 445 { - RA 176.92245210 - Dec 78.69116094 - Distance 17.1424 # 190.2625 +/- 0.0475 mas + RA 176.93940798 + Dec 78.69329745 + Distance 17.1368 # 190.3251 +/- 0.0194 mas SpectralType "M4.0Ve" Radius 181000 # approx. for class AppMag 10.84 @@ -1405,9 +1452,9 @@ Barycenter "GJ 1116" # https://www.aanda.org/articles/aa/abs/2014/07/aa23615-14/aa23615-14.html "WISE 1540-5101:WISE J154045.65-510139.2" { - RA 235.18140398 - Dec -51.02665765 - Distance 17.3441 # 191.5301 +/- 0.6037 mas + RA 235.19517746 + Dec -51.02810131 + Distance 17.3738 # 187.7290 +/- 0.0496 mas SpectralType "M6.5" Radius 83500 # approx. for class AppMag 15.26 # measured w/ ESO Faint Object Spectrograph and Camera @@ -1441,9 +1488,9 @@ Barycenter "GJ 1116" "GJ 3323:LP 656-38:RECONS 3" { - RA 75.48927544 - Dec -6.94621441 - Distance 17.5331 # 186.0231 +/- 0.0590 + RA 75.48680521 + Dec -6.94858741 + Distance 17.5309 # 186.0466 +/- 0.0277 mas SpectralType "M4.0Ve" Radius 180000 # approx. for class AppMag 12.196 @@ -1451,31 +1498,31 @@ Barycenter "GJ 1116" 67155 # Lalande 25372 { - RA 206.43239772 - Dec 14.89152033 - Distance 17.7274 # 183.9836 +/- 0.0509 + RA 206.44056584 + Dec 14.88505270 + Distance 17.7263 # 183.9962 +/- 0.0253 mas SpectralType "M2V" Radius 306000 # approx. for class AppMag 8.50 } -# mass ratio from Sahu et al. (2017), Science 356 (6342), 1046 +# parameters from Sahu et al. (2017), Science 356 (6342), 1046 # "Relativistic deflection of background starlight measures the mass of # a nearby white dwarf star" # https://arxiv.org/abs/1706.02037 # orbit listed in Sixth Orbit Catalogue is of poor quality, so unused Barycenter 21088 "Gliese 169.1:Stein 2051" { - RA 67.79800245 # mass ratio MB/MA 2.07 - Dec 58.97707796 - Distance 18.020 + RA 67.81236059 # mass ratio MB/MA 2.07 + Dec 58.96899220 + Distance 17.9935 } 1004123744 "Gliese 169.1 A:Stein 2051 A" { - RA 67.79795272 - Dec 58.97706349 - Distance 18.0774 # 180.4215 +/- 0.5863 mas + RA 67.80919063 + Dec 58.96797997 + Distance 17.9954 # 181.2438 +/- 0.0499 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 10.977 @@ -1483,18 +1530,38 @@ Barycenter 21088 "Gliese 169.1:Stein 2051" 1020623744 "Gliese 169.1 B:Stein 2051 B" { - RA 67.80237894 - Dec 58.97813685 - Distance 17.9917 # 181.2815 +/- 0.0450 mas + RA 67.81389197 + Dec 58.96948121 + Distance 17.9926 # 181.2730 +/- 0.0203 mas SpectralType "DC5" + Temperature 7122 + Radius 7900 AppMag 11.19 } +# coordinates, parallax from Dupuy & Liu (2012), ApJS 201 (2), 19 +# "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition" +# http://iopscience.iop.org/article/10.1088/0067-0049/201/2/19/meta +# radius and temperature from Line et al. (2017), ApJ 848 (2), 83 +# "Uniform Atmospheric Retrieval Analysis of Ultracool Dwarfs. II. Properties +# of 11 T dwarfs" +# http://iopscience.iop.org/0004-637X/848/2/83/ +"2MASS 1114-2618:2MASS J11145133-2618235" +{ + RA 168.7032979 + Dec -26.3074976 + Distance 18.201 # 179.2 +/- 1.4 mas + SpectralType "T7.5V" + Temperature 680 + Radius 64000 + AbsMag 40 # extremely low +} + 33226 # Wolf 294 { - RA 103.70399048 - Dec 33.26817738 - Distance 18.2043 # 179.1642 +/- 0.0632 mas + RA 103.70012923 + Dec 33.26640802 + Distance 18.2146 # 179.0629 +/- 0.0280 mas SpectralType "M3V" Radius 270000 # approx. for class AppMag 10.11 @@ -1502,56 +1569,31 @@ Barycenter 21088 "Gliese 169.1:Stein 2051" 103039 # LP 816-60 { - RA 313.13756964 - Dec -16.97472438 - Distance 18.3106 # from 178.1243 +/- 0.0849 mas + RA 313.13613276 + Dec -16.97455847 + Distance 18.3305 # 177.9312 +/- 0.0365 mas SpectralType "M4V" Radius 181000 # approx. for class AppMag 11.458 } -# parallax from Faherty et al. (2012), ApJ 752, (1), 56 -# "The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs" -# http://iopscience.iop.org/article/10.1088/0004-637X/752/1/56/meta -# radius and temperature from Line et al. (2017), ApJ 848 (2), 83 -# "Uniform Atmospheric Retrieval Analysis of Ultracool Dwarfs. II. Properties -# of 11 T dwarfs" -# http://iopscience.iop.org/0004-637X/848/2/83/ -"2MASS 1114-2618:2MASS J11145133-2618235" +# parameters from Kirkpatrick et al. (2021) +"WISE 0350-5658:WISE J035000.32-565830.2" { - RA 168.713904 - Dec -26.306544 - Distance 18.45 # 176.8 +/- 7.0 mas - SpectralType "T7.5V" - Temperature 680 - Radius 64000 - AbsMag 40 # extremely low -} - -# parallax from Marsh et al. (2013), ApJ 762 (2), 119 -# "Parallaxes and Proper Motions of Ultracool Brown Dwarfs of Spectral -# Types Y and Late T" -# http://iopscience.iop.org/article/10.1088/0004-637X/762/2/119/meta -# rotation period, radius from Burningham et al. (2016), MNRAS 463, 2 -# "A LOFAR mini-survey for low-frequency radio emission from the nearest brown dwarfs" -# https://academic.oup.com/mnras/article/463/2/2202/2892466 -"WISE 1741+2553:WISE J174124.25+255319.6" -{ - RA 265.352586 - Dec 25.892878 - Distance 18.53 # 176 +/- 25 mas - SpectralType "T9V" - Temperature 620 + RA 57.500868 + Dec -56.975831 + Distance 18.490 # 176.4 +/- 2.3 mas + SpectralType "Y1V" + Temperature 388 Radius 60000 # approx. AbsMag 40 # extremely low - RotationPeriod 2 } "2MASS 1835+3259:2MASS J18353790+3259545" { - RA 278.90783482 - Dec 32.99814204 - Distance 18.5501 # from 175.8244 +/- 0.0905 mas + RA 278.90744885 + Dec 32.99478716 + Distance 18.5534 # 175.7930 +/- 0.0468 mas SpectralType "M8.5V" Radius 66000 # approx. for class AppMag 18.27 @@ -1559,9 +1601,9 @@ Barycenter 21088 "Gliese 169.1:Stein 2051" 25878 # Wolf 1453 { - RA 82.86414936 - Dec -3.67722821 - Distance 18.5919 # from 175.4287 +/- 0.0672 mas + RA 82.86754111 + Dec -3.68652760 + Distance 18.6042 # 175.3131 +/- 0.0204 mas SpectralType "M1.5Ve" Radius 324000 # approx. for class AppMag 7.968 @@ -1574,30 +1616,21 @@ Barycenter 21088 "Gliese 169.1:Stein 2051" { RA 63.8381022 Dec -9.5835266 - Distance 18.62 # 175.2 +/- 1.7 mas + Distance 18.616 # 175.2 +/- 1.7 mas SpectralType "T8.0V" Temperature 750 Radius 60000 # approx. AbsMag 40 # extremely low } -96100 # Sig Dra -{ - RA 293.08995958 - Dec 69.66117632 - Distance 18.769 # 173.77 +/- 0.18 mas - SpectralType "K0V" - AppMag 4.680 -} - -# Orbit from Brandt et al. (2019), eprint arXiv 1910.01652 -# "A Dynamical Mass of 70 ± 5 Jupiter Masses for Gliese 229B, the First Imaged T Dwarf" -# https://arxiv.org/abs/1910.01652 +# Brandt et al. (2021), AJ 162 (6), 301 +# "Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3" +# https://iopscience.iop.org/article/10.3847/1538-3881/ac273e Barycenter 29295 "Gliese 229:Luyten 668-21:LPM 230" { - RA 92.64484913 # mass ratio 0.556:0.05 - Dec -21.86626696 - Distance 18.7775 # 173.6955 +/- 0.0457 mas + RA 92.64357908 + Dec -21.86782311 + Distance 18.7906 # 173.574 +/- 0.013 mas } "Gliese 229 A:Luyten 668-21 A:LPM 230 A" @@ -1608,13 +1641,13 @@ Barycenter 29295 "Gliese 229:Luyten 668-21:LPM 230" Radius 341000 # approx. for class EllipticalOrbit { # fully specified orbit - Period 263 - SemiMajorAxis 3.84 # mass ratio 0.54:70.4J - Eccentricity 0.846 - Inclination 40.3 - AscendingNode 345.3 - ArgOfPericenter 246.9 - MeanAnomaly 300.6 + Period 237.9 + SemiMajorAxis 3.5 # mass ratio 0.579:71.4J + Eccentricity 0.851 + Inclination 41.2 + AscendingNode 353.4 + ArgOfPericenter 237.9 + MeanAnomaly 296 } } @@ -1625,35 +1658,45 @@ Barycenter 29295 "Gliese 229:Luyten 668-21:LPM 230" AbsMag 33.5 # for approximate radius in Celestia EllipticalOrbit { # fully specified orbit - Period 263 - SemiMajorAxis 30.87 # mass ratio 0.54:70.4J - Eccentricity 0.846 - Inclination 40.3 - AscendingNode 345.3 - ArgOfPericenter 66.9 - MeanAnomaly 300.6 + Period 237.9 + SemiMajorAxis 29.8 # mass ratio 0.579:71.4J + Eccentricity 0.851 + Inclination 41.2 + AscendingNode 353.4 + ArgOfPericenter 57.9 + MeanAnomaly 296 } } +96100 # Sig Dra +{ + RA 293.09759805 + Dec 69.65345106 + Distance 18.7993 # 173.4939 +/- 0.0748 mas + SpectralType "K0V" + AppMag 4.680 +} + 26857 # Ross 47 { - RA 85.53861374 - Dec 12.48933659 - Distance 18.8850 # 172.7068 +/- 0.0788 mas + RA 85.54770759 + Dec 12.48235992 + Distance 18.8883 # 172.6762 +/- 0.0286 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 11.509 } +# Used Gaia EDR3 parallax for A # mass and radius of A from Demory et al. (2009), A&A 505 (1), 205 # "Mass-radius relation of low and very low-mass stars revisited with the VLTI" # https://www.aanda.org/articles/aa/full_html/2009/37/aa11976-09/aa11976-09.html # masses of B, C from same sources as orbit Barycenter "Gliese 570:ADS 9446" { - RA 224.363313679 # mass ratio 0.802:(0.586:0.390) - Dec -21.41332223 - Distance 19.1844 # 170.0112 +/- 0.0851 mas + RA 224.36820687 # mass ratio 0.802:(0.586:0.390) + Dec -21.42079800 + Distance 19.1987 # 169.8843 +/- 0.0653 mas } 73184 "KX Lib:Gliese 570 A:ADS 9446 A" @@ -1665,7 +1708,7 @@ Barycenter "Gliese 570:ADS 9446" EllipticalOrbit { # fully specified orientation Period 2130 - SemiMajorAxis 104.4 # mass ratio 0.802:(0.586:0.390) + SemiMajorAxis 104.5 # mass ratio 0.802:(0.586:0.390) Eccentricity 0.20 Inclination 142.6 AscendingNode 191.6 @@ -1680,7 +1723,7 @@ Barycenter 73182 "Gliese 570 BC" EllipticalOrbit { # fully specified orientation Period 2130 - SemiMajorAxis 85.8 # mass ratio 0.802:(0.586:0.390) + SemiMajorAxis 85.9 # mass ratio 0.802:(0.586:0.390) Eccentricity 0.20 Inclination 142.6 AscendingNode 191.6 @@ -1725,36 +1768,46 @@ Barycenter 73182 "Gliese 570 BC" } } -# radius and temperature from Line et al. (2015), ApJ 807 (2), 183 -# "Uniform Atmospheric Retrieval Analysis of Ultracool Dwarfs. I. Characterizing -# Benchmarks, Gl 570D and HD 3651B" -# http://iopscience.iop.org/article/10.1088/0004-637X/807/2/183/meta +# radius and temperature from Zhang et al. (2021), ApJ 911 (1), 7 +# "The Hawaii Infrared Parallax Program. V. New T-dwarf Members and Candidate +# Members of Nearby Young Moving Groups" +# https://iopscience.iop.org/article/10.3847/1538-4357/abe3fa "Gliese 570 D:ADS 9446 D" { RA 224.31233 Dec -21.36328 - Distance 19.184 - SpectralType "T8V" - Temperature 710 - Radius 80000 + Distance 19.1987 + SpectralType "T7.5V" + Temperature 786 + Radius 64000 AbsMag 40 # extremely low } 86990 # Luyten 205-128 { - RA 266.64263979 - Dec -57.31904446 - Distance 19.2013 # 169.8613 +/- 0.1184 mas + RA 266.63344447 + Dec -57.32506180 + Distance 19.2078 # 169.8042 +/- 0.0465 mas SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 10.783 } +"Gliese 754:Luyten 347-14" +{ + RA 290.20411627 + Dec -45.57110617 + Distance 19.2724 # 169.2351 +/- 0.0588 mas + SpectralType "M4.5V" + Radius 180000 # approx. for class + AppMag 12.23 +} + 117473 # Gliese 908 { - RA 357.30218808 - Dec 2.40122307 - Distance 19.2583 # 169.3585 +/- 0.0595 mas + RA 357.30660382 + Dec 2.39691794 + Distance 19.2745 # 169.2163 +/- 0.0281 mas SpectralType "M1V" Radius 341000 # approx. for class AppMag 8.993 @@ -1770,16 +1823,16 @@ Barycenter 73182 "Gliese 570 BC" # https://arxiv.org/abs/1511.04682 Barycenter 94761 "Gliese 752:Ross 652:Wolf 1055" # orbit of A & B unknown { - RA 289.231870107 # mass ratio 0.45:0.09 - Dec 5.1658232850 - Distance 19.2810 # 169.1590 +/- 0.0520 mas + RA 289.22927187 # mass ratio 0.45:0.09 + Dec 5.15987580 + Distance 19.2942 } "V1428 Aql:Gliese 752 A:Ross 652 A:Wolf 1055 A:HD 180617 A" { - RA 289.23023552 - Dec 5.16889968 - Distance 19.2810 + RA 289.22765150 + Dec 5.16297630 + Distance 19.2922 # 169.0615 +/- 0.0239 mas SpectralType "M2.5V" Radius 315000 AppMag 9.115 @@ -1788,52 +1841,29 @@ Barycenter 94761 "Gliese 752:Ross 652:Wolf 1055" # orbit of A & B unknown "Van Biesbroeck's Star:V1298 Aql:Gliese 752 B:Ross 652 B:Wolf 1055 B:VB 10:HD 180617 B" { - RA 289.242917 - Dec 5.150278 - Distance 19.2810 # used Gaia DR parallax of A + RA 289.23737370 + Dec 5.14437332 + Distance 19.3045 # 168.9537 +/- 0.0668 mas SpectralType "M8.0V" Radius 86000 AppMag 17.30 } -"Gliese 754:Luyten 347-14" -{ - RA 290.19993122 - Dec -45.55823034 - Distance 19.2887 # 169.0921 +/- 0.2165 mas - SpectralType "M4.5V" - Radius 180000 # approx. for class - AppMag 12.23 -} - 76074 # Gliese 588 { - RA 233.05388594 - Dec -41.27559211 - Distance 19.2983 # 169.0074 +/- 0.0580 mas + RA 233.04692742 + Dec -41.28017409 + Distance 19.2996 # 168.9965 +/- 0.0270 mas SpectralType "M2.5V" Radius 290000 # approx. for class AppMag 9.311 } -# parameters from Martin et al. (2018) -"WISE 0350-5658:WISE J035000.32-565830.2" -{ - RA 57.500996 - Dec -56.975638 - Distance 19.317 # 168.84 +/- 8.53 mas - SpectralType "Y1V" - Temperature 300 - Radius 60000 # approx. - AbsMag 40 # extremely low -} - -# Used Gaia DR2 parallax for B Barycenter 3821 "Achird:ETA Cas:24 Cas:Gliese 34:ADS 671" { - RA 12.274657128 # mass ratio 1.07:0.55 - Dec 57.81608312 - Distance 19.328 # 168.7521 +/- 0.0377 mas + RA 12.28385489 # mass ratio 1.07:0.55 + Dec 57.81375040 # A: 168.8322 +/- 0.1663 mas + Distance 19.331 # B: 168.7186 +/- 0.0216 mas } # Mass ratio from theoretical values from same source as orbit @@ -1845,7 +1875,7 @@ Barycenter 3821 "Achird:ETA Cas:24 Cas:Gliese 34:ADS 671" EllipticalOrbit { Period 479.27 - SemiMajorAxis 24.22 # mass ratio 1.07:0.55 + SemiMajorAxis 24.23 # mass ratio 1.07:0.55 Eccentricity 0.50 Inclination 152.40 AscendingNode 8.78 @@ -1862,7 +1892,7 @@ Barycenter 3821 "Achird:ETA Cas:24 Cas:Gliese 34:ADS 671" EllipticalOrbit { Period 479.27 - SemiMajorAxis 47.12 # mass ratio 1.07:0.55 + SemiMajorAxis 47.13 # mass ratio 1.07:0.55 Eccentricity 0.50 Inclination 152.40 AscendingNode 8.78 @@ -1873,17 +1903,16 @@ Barycenter 3821 "Achird:ETA Cas:24 Cas:Gliese 34:ADS 671" Barycenter "Guniibuu:36 Oph:Gliese 663:ADS 10417" # orbit of (AB) & C unknown { - RA 258.907618286 # mass ratio (0.75:0.76):0.72 - Dec -26.58414637 - Distance 19.4373 + RA 258.90522009 # mass ratio (0.75:0.76):0.72 + Dec -26.58920251 + Distance 19.4092 } -# Distance from average of distances from Gaia DR2 parallax for A and B Barycenter 84405 "Guniibuu AB:36 Oph AB:Gliese 663 AB" { - RA 258.837020242 # mass ratio 0.75:0.76 - Dec -26.60226476 # A: 167.8221 +/- 0.1556 mas - Distance 19.4373 # B: 167.7764 +/- 0.2210 mas + RA 258.83461527 # mass ratio 0.75:0.76 + Dec -26.60734861 # A: 168.1303 +/- 0.1081 mas + Distance 19.405 # B: 168.0031 +/- 0.1343 mas } # Average masses from Luck, R. E. (2017), AJ 153 (1), 21 @@ -1897,7 +1926,7 @@ Barycenter 84405 "Guniibuu AB:36 Oph AB:Gliese 663 AB" EllipticalOrbit { Period 470.9 - SemiMajorAxis 38.99 # mass ratio 0.75:0.76 + SemiMajorAxis 38.93 # mass ratio 0.75:0.76 Eccentricity 0.92 Inclination 13.35 AscendingNode 348.86 @@ -1914,7 +1943,7 @@ Barycenter 84405 "Guniibuu AB:36 Oph AB:Gliese 663 AB" EllipticalOrbit { Period 470.9 - SemiMajorAxis 38.48 # mass ratio 0.75:0.76 + SemiMajorAxis 38.42 # mass ratio 0.75:0.76 Eccentricity 0.92 Inclination 13.35 AscendingNode 348.86 @@ -1925,46 +1954,46 @@ Barycenter 84405 "Guniibuu AB:36 Oph AB:Gliese 663 AB" 84478 "Guniibuu C:36 Oph C:V2215 Oph:Gliese 664:Gliese 663 C:ADS 10417 C" { - RA 259.05567807 - Dec -26.5461481 - Distance 19.4373 # used same distance as A and B + RA 259.05329410 + Dec -26.55114609 + Distance 19.4185 # 167.9617 +/- 0.0311 mas SpectralType "K5V" AppMag 6.34 } -# parameters from Martin et al. (2018) +37766 # Ross 882 +{ + RA 116.16583593 + Dec 3.55048445 + Distance 19.5330 # 166.9769 +/- 0.0343 mas + SpectralType "M4.0V" + Radius 180000 # approx. for class + AppMag 11.225 +} + +# parameters from Kirkpatrick et al. (2021) # BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 # "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" # https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta "WISE 1541-2250:WISE J1541-2250:WISEPA J154151.66-225025.2" { - RA 235.464061 - Dec -22.840554 - Distance 19.524 # 167.05 +/- 4.19 mas + RA 235.463692 + Dec -22.840586 + Distance 19.542 # 166.9 +/- 2.0 mas SpectralType "Y1" Temperature 350 Radius 69900 AbsMag 40 # extremely low } -37766 # Ross 882 -{ - RA 116.16738595 - Dec 3.55246606 - Distance 19.5281 # 167.0186 +/- 0.0592 mas - SpectralType "M4.0V" - Radius 180000 # approx. for class - AppMag 11.225 -} - # masses and parallaxes from Benedict et al. (2016), AJ 152 (5), 141 # "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence # M Dwarfs" # http://iopscience.iop.org/article/10.3847/0004-6256/152/5/141/meta Barycenter 1242 "GJ 1005:Luyten 722-22" { - RA 3.86712874 - Dec -16.133786 + RA 3.86988027 + Dec -16.13657165 Distance 19.577 # 166.6 +/- 0.3 mas } @@ -2004,25 +2033,25 @@ Barycenter 1242 "GJ 1005:Luyten 722-22" Barycenter 99461 "Gliese 783:CD-36 13940:J Herschel 5173:HJ 5173" # orbit of A & B unknown { - RA 302.7999508 # mass ratio 0.82:0.20 - Dec -36.1014624 - Distance 19.618 + RA 302.80247598 # mass ratio 0.82:0.20 + Dec -36.10846971 + Distance 19.6093 } "Gliese 783 A:CD-36 13940 A:J Herschel 5173 A:HJ 5173 A" { - RA 302.79974369 - Dec -36.10120932 - Distance 19.6211 # 166.2274 +/- 0.1256 mas + RA 302.80226904 + Dec -36.10821654 + Distance 19.6093 # 166.3272 +/- 0.1065 mas SpectralType "K2.5V" AppMag 5.32 } "Gliese 783 B:CD-36 13940 B:J Herschel 5173 B:HJ 5173 B" { - RA 302.8008 - Dec -36.10250 - Distance 19.6211 + RA 302.8033 # matched to the same epoch as primary's coordinates + Dec -36.1095 # using the latter's proper motions + Distance 19.6093 SpectralType "M3.5V" Radius 180000 # approx. for class AppMag 11.50 @@ -2030,9 +2059,9 @@ Barycenter 99461 "Gliese 783:CD-36 13940:J Herschel 5173:HJ 5173" # orbit of A & 15510 # 82 Eri { - RA 49.98187890 - Dec -43.06978264 - Distance 19.711 # 165.47 +/- 0.19 mas + RA 50.00034362 + Dec -43.06655253 + Distance 19.7045 # 165.5242 +/- 0.0784 mas SpectralType "G6V" AppMag 4.27 } @@ -2042,9 +2071,9 @@ Barycenter 99461 "Gliese 783:CD-36 13940:J Herschel 5173:HJ 5173" # orbit of A & # http://iopscience.iop.org/article/10.1088/0004-637X/760/1/55/meta Barycenter 34603 "Gliese 268:Ross 986" { - RA 107.50764113 - Dec 38.52946844 - Distance 19.8103 # 164.6395 +/- 0.1338 mas + RA 107.50514340 + Dec 38.52526942 + Distance 19.7414 # 165.2147 +/- 0.0636 mas } "QY Aur:Gliese 268 A:Ross 986 A" @@ -2055,7 +2084,7 @@ Barycenter 34603 "Gliese 268:Ross 986" EllipticalOrbit { # fully specified orbit Period 0.028547 - SemiMajorAxis 0.03110 # mass ratio 0.22599:0.19248 + SemiMajorAxis 0.03090 # mass ratio 0.22599:0.19248 Eccentricity 0.3203 Inclination 8.92 AscendingNode 66.51 @@ -2072,7 +2101,7 @@ Barycenter 34603 "Gliese 268:Ross 986" EllipticalOrbit { # fully specified orbit Period 0.028547 - SemiMajorAxis 0.03641 # mass ratio 0.22599:0.19248 + SemiMajorAxis 0.03628 # mass ratio 0.22599:0.19248 Eccentricity 0.3203 Inclination 8.92 AscendingNode 66.51 @@ -2083,29 +2112,29 @@ Barycenter 34603 "Gliese 268:Ross 986" 99240 # Del Pav { - RA 302.18170612 - Dec -66.18206758 - Distance 19.923 # 163.71 +/- 0.17 mas + RA 302.19503989 + Dec -66.18709128 + Distance 19.8931 # 163.9544 +/- 0.1222 mas SpectralType "G8IV" AppMag 3.56 } "2MASS 0136+0933:2MASS J01365662+0933473:SIMP J013656.5+093347" { - RA 24.23566572 - Dec 9.56314736 - Distance 19.9261 # 163.6824 +/- 0.7223 mas + RA 24.24124979 + Dec 9.56307045 + Distance 19.9548 # 163.4478 +/- 0.4629 mas SpectralType "T2.5V" AbsMag 27.5 # for approximate radius in Celestia } -# parallax from Faherty et al. (2012), ApJ 752, (1), 56 -# "The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs" -# http://iopscience.iop.org/article/10.1088/0004-637X/752/1/56/meta +# coordinates, parallax from Schilbach, Röser & Scholz (2009), A&A 493 (2), L27-L30 +# "Trigonometric parallaxes of ten ultracool subdwarfs" +# https://www.aanda.org/articles/aa/abs/2009/02/aa11281-08/aa11281-08.html "2MASS 0937+2931:2MASS J09373487+2931409" { - RA 144.395333 - Dec 29.528056 + RA 144.395250 + Dec 29.528189 Distance 19.961 # 163.39 +/- 1.76 mas SpectralType "T6.0V" AbsMag 33.5 # for approximate radius in Celestia @@ -2113,48 +2142,62 @@ Barycenter 34603 "Gliese 268:Ross 986" 99701 # Gliese 784 { - RA 303.47248496 - Dec -45.16402041 - Distance 20.0932 # 162.3212 +/- 0.0495 mas + RA 303.47739056 + Dec -45.16473054 + Distance 20.1062 # 162.2171 +/- 0.0225 mas SpectralType "M0V" Radius 432000 # approx. for class AppMag 7.966 } +# parameters from Kirkpatrick et al. (2021) +# BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 +# "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" +# https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta +"WISE 2209+2711:WISE J220905.73+271143.9" +{ + RA 332.275805 + Dec 27.193641 + Distance 20.170 # 161.7 +/- 2.0 mas + SpectralType "Y0V" + Temperature 350 + Radius 69900 + AbsMag 40 # extremely low +} + "GJ 1221:LP 44-113" { - RA 267.03330405 - Dec 70.87664478 - Distance 20.2604 # 160.9819 +/- 0.0143 mas + RA 267.01612291 + Dec 70.88157381 + Distance 20.2588 # 160.9952 +/- 0.0119 mas SpectralType "DQ9P" AppMag 14.15 } 71253 # Gliese 555 { - RA 218.57004817 - Dec -12.51956038 - Distance 20.3702 # 160.1141 +/- 0.1135 mas + RA 218.56843176 + Dec -12.51692385 + Distance 20.3946 # 159.9225 +/- 0.0546 mas SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 11.317 } -# Distance from average of distances from Gaia DR2 parallax for A and B Barycenter 116132 "Gliese 896:BD+19 5116" { - RA 352.96797137 # mass ratio (0.34:0.13):(0.16:0.09) - Dec 19.93724591 # A: 159.7098 +/- 0.0827 mas - Distance 20.400 # B: 160.0598 +/- 0.1079 mas + RA 352.97066249 # mass ratio (0.34:0.13):(0.16:0.09) + Dec 19.93710426 # A: 159.6634 +/- 0.0341 mas + Distance 20.418 # B: 159.9085 +/- 0.0513 mas } -Barycenter "Gliese 896 A:BD+19 5116 A" +Barycenter 1000231723 "Gliese 896 A:BD+19 5116 A" { OrbitBarycenter "Gliese 896" EllipticalOrbit { Period 359 - SemiMajorAxis 14.92 # mass ratio (0.34:0.13):(0.16:0.09) + SemiMajorAxis 14.9 # mass ratio (0.34:0.13):(0.16:0.09) Eccentricity 0.2 Inclination 19.6 AscendingNode 138.8 @@ -2163,13 +2206,13 @@ Barycenter "Gliese 896 A:BD+19 5116 A" } } -Barycenter "Gliese 896 B:BD+19 5116 B" +Barycenter 2000231723 "Gliese 896 B:BD+19 5116 B" { OrbitBarycenter "Gliese 896" EllipticalOrbit { Period 359 - SemiMajorAxis 28.0 # mass ratio (0.34:0.13):(0.16:0.09) + SemiMajorAxis 28.1 # mass ratio (0.34:0.13):(0.16:0.09) Eccentricity 0.2 Inclination 19.6 AscendingNode 138.8 @@ -2243,24 +2286,35 @@ Barycenter "Gliese 896 B:BD+19 5116 B" 74995 # Gliese 581 { - RA 229.86177972 - Dec -7.72227527 - Distance 20.5454 # 158.7492 +/- 0.0523 mas + RA 229.85630133 + Dec -7.72270702 + Distance 20.5494 # 158.7183 +/- 0.0301 mas SpectralType "M3V" Radius 270000 # approx. for class AppMag 10.560 } +# parameters from Kirkpatrick et al. (2021) +"WISE 1405+5534:WISE J140518.39+553421.3" +{ + RA 211.320620 + Dec 55.572896 + Distance 20.617 # 158.2 +/- 2.6 mas + SpectralType "Y0V" + Temperature 411 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + # Parameters from Gonzalez-Alvarez et al. (2020), A&A 637, A93 # "The CARMENES search for exoplanets around M dwarfs. A super-Earth planet orbiting # HD 79211 (GJ 338 B)" # https://arxiv.org/abs/2003.13052 -# Distance from average of distances from Gaia DR2 parallax for A and B Barycenter "Gliese 338:Struve 1321:ADS 7251" { - RA 138.59872250 # mass ratio 0.69:0.64 - Dec 52.46994924 # A: 157.8796 +/- 0.0366 mas - Distance 20.658 # B: 157.8851 +/- 0.0414 mas + RA 138.58729103 # mass ratio 0.69:0.64 + Dec 52.68376704 # A: 157.8879 +/- 0.0197 mas + Distance 20.658 # B: 157.8825 +/- 0.0211 mas } 45343 "Gliese 338 A:Struve 1321 A:ADS 7251 A" @@ -2305,19 +2359,27 @@ Barycenter "Gliese 338:Struve 1321:ADS 7251" "LHS 2090:LP 368-128" { - RA 135.09811222 - Dec 21.83469395 - Distance 20.8063 # 156.7584 +/- 0.1329 mas + RA 135.09564332 + Dec 21.83206260 + Distance 20.7388 # 157.2686 +/- 0.0535 mas SpectralType "M6.5V" Radius 105000 # approx. for class AppMag 16.100 } +# Orbit from Agati et al. (2015), A&A 574 (A6), 32 +# "Are the orbital poles of binary stars in the solar neighbourhood anisotropically +# distributed?" +# https://www.aanda.org/articles/aa/abs/2015/02/aa23056-13/aa23056-13.html +# Masses from Söderhjelm, S. (1999), A&A 341, 121 +# "Visual binary orbits and masses post Hipparcos" +# http://adsabs.harvard.edu/abs/1999A%26A...341..121S +# Distance from RECONS' weighted parallax Barycenter 84140 "Gliese 661:BD+45 2505" { - RA 258.03296559 - Dec 45.66589325 - Distance 20.865 + RA 258.03421598 + Dec 45.65905974 + Distance 20.865 # 156.32 +/- 1.28 mas } "Gliese 661 A:BD+45 2505 A" @@ -2327,14 +2389,14 @@ Barycenter 84140 "Gliese 661:BD+45 2505" Radius 270000 # approx. for class AppMag 10.02 - EllipticalOrbit { - Period 12.96 - SemiMajorAxis 2.43 # mass ratio 0.36:0.35 - Eccentricity 0.75 - Inclination 27.34 - AscendingNode 65.56 - ArgOfPericenter 138.70 - MeanAnomaly 248.89 + EllipticalOrbit { # fully specified orientation + Period 12.85 + SemiMajorAxis 2.78 # mass ratio 0.36:0.35 + Eccentricity 0.80 + Inclination 58.0 + AscendingNode 288.7 + ArgOfPericenter 256.9 + MeanAnomaly 256.6 } } @@ -2345,60 +2407,81 @@ Barycenter 84140 "Gliese 661:BD+45 2505" Radius 180000 # approx. for class AppMag 10.25 - EllipticalOrbit { - Period 12.96 - SemiMajorAxis 2.50 # mass ratio 0.36:0.35 - Eccentricity 0.75 - Inclination 27.34 - AscendingNode 65.56 - ArgOfPericenter 318.70 - MeanAnomaly 248.89 + EllipticalOrbit { # fully specified orientation + Period 12.85 + SemiMajorAxis 2.85 # mass ratio 0.36:0.35 + Eccentricity 0.80 + Inclination 58.0 + AscendingNode 288.7 + ArgOfPericenter 76.9 + MeanAnomaly 256.6 } } +"2MASS 1503+2525:2MASS J15031961+2525196" +{ + RA 225.83214226 + Dec 25.42464449 + Distance 20.9375 # 155.7758 +/- 0.7557 mas + SpectralType "T5.5V" + AbsMag 32 # for approximate radius in Celestia +} + "LP 944-20" { - RA 54.89688549 - Dec -35.42878568 - Distance 20.9398 # 155.7590 +/- 0.0991 mas + RA 54.89857021 + Dec -35.42759364 + Distance 20.9614 # 155.5982 +/- 0.0522 mas SpectralType "M9.5Ve" Radius 56000 # approx. for class AppMag 18.69 } -"Gliese 223.2:LP 658-2:HL 4" +"Gliese 223.2:GJ 9193:LP 658-2:HL 4" { - RA 88.78971006 - Dec -4.16862949 - Distance 21.0084 # 155.2501 +/- 0.0287 mas + RA 88.79209556 + Dec -4.17892709 + Distance 21.0102 # 155.2373 +/- 0.0175 mas SpectralType "DZ9" # DZ11 AppMag 14.45 } -"2MASS 1503+2525:2MASS J15031961+2525196" +"GL Vir:GJ 1156:Luyten 1190-34" { - RA 225.83171067 - Dec 25.42215925 - Distance 21.0531 # 154.9208 +/- 1.1025 mas - SpectralType "T5.5V" - AbsMag 32 # for approximate radius in Celestia + RA 184.74174734 + Dec 11.12695237 + Distance 21.0832 # 154.6999 +/- 0.0445 mas + SpectralType "M4.5V" + Radius 160000 # approx. for class + AppMag 13.898 } +80459 # Gliese 625 +{ + RA 246.35588833 + Dec 54.30333867 + Distance 21.1309 # 154.3503 +/- 0.0161 mas + SpectralType "M1.5V" + Radius 324000 # approx. for class + AppMag 10.17 +} + +# Used Gaia EDR3 parallax for C Barycenter "Gliese 644:Wolf 630" # orbit of (AB) & C unknown { - RA 253.8717855 # mass ratio (0.4155:(0.3466:0.3143)):0.0841 - Dec -8.3405565 - Distance 21.080 + RA 253.86817134 # mass ratio (0.4155:(0.3466:0.3143)):0.0841 + Dec -8.34454331 + Distance 21.1837 # 153.9659 +/- 0.0570 mas } -# Parallax and masses from Segransan et al. (2000), A&A 364, 665 +# masses from Segransan et al. (2000), A&A 364, 665 # "Accurate masses of very low mass stars. III. 16 new or improved masses" # http://adsabs.harvard.edu/abs/2000A%26A...364..665S Barycenter 82817 "Gliese 644 AB:Wolf 630 AB" { - RA 253.86982326 - Dec -8.3363299 - Distance 21.070 # 154.8 +/- 0.6 mas + RA 253.86621222 + Dec -8.34032583 + Distance 21.1837 } "V1054 Oph:Gliese 644 A:Wolf 630 A" @@ -2409,7 +2492,7 @@ Barycenter 82817 "Gliese 644 AB:Wolf 630 AB" EllipticalOrbit { # fully specified orientation Period 1.718 - SemiMajorAxis 0.90 # mass ratio 0.4155:(0.3466:0.3143) + SemiMajorAxis 0.91 # mass ratio 0.4155:(0.3466:0.3143) Eccentricity 0.04 Inclination 82.15 AscendingNode 324.51 @@ -2473,54 +2556,19 @@ Barycenter "Gliese 644 B:Wolf 630 B" # http://iopscience.iop.org/article/10.1088/0004-637X/804/1/64/meta "Gliese 644 C:Wolf 630 C:VB 8" { - RA 253.89690059 - Dec -8.39465358 - Distance 21.2046 # 153.8139 +/- 0.1148 mas + RA 253.89324627 + Dec -8.39852302 + Distance 21.1837 SpectralType "M7V" AppMag 16.916 Radius 78680 } -"GL Vir:GJ 1156:Luyten 1190-34" -{ - RA 184.74749966 - Dec 11.12604729 - Distance 21.1094 # 154.5077 +/- 0.1108 mas - SpectralType "M4.5V" - Radius 160000 # approx. for class - AppMag 13.898 -} - -80459 # Gliese 625 -{ - RA 246.35259712 - Dec 54.30410160 - Distance 21.1144 # 154.4710 +/- 0.0273 mas - SpectralType "M1.5V" - Radius 324000 # approx. for class - AppMag 10.17 -} - -# parameters from Martin et al. (2018) -# BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 -# "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" -# https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta -"WISE 2209+2711:WISE J220905.73+271143.9" -{ - RA 332.273892 - Dec 27.195556 - Distance 21.123 # 154.41 +/- 5.67 mas - SpectralType "Y0V" - Temperature 350 - Radius 69900 - AbsMag 40 # extremely low -} - 82809 "Gliese 643:Wolf 629" { - RA 253.85508989 - Dec -8.32258365 - Distance 21.1901 # 153.9189 +/- 0.1310 mas + RA 253.85142033 + Dec -8.32657626 + Distance 21.1961 # 153.8754 +/- 0.0474 mas SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 11.759 @@ -2528,67 +2576,87 @@ Barycenter "Gliese 644 B:Wolf 630 B" "GJ 1128:LHS 271:Luyten 100-115" { - RA 145.69309184 - Dec -68.88500107 - Distance 21.2090 # 153.7816 +/- 0.0554 mas + RA 145.69216012 + Dec -68.87998538 + Distance 21.2121 # 153.7593 +/- 0.0249 mas SpectralType "M4.0V" Radius 180000 # approx. for class AppMag 12.78 } -# parameters from Martin et al. (2018) -"WISE 0410+1502:WISE J041022.71+150248.4" -{ - RA 62.595853 - Dec 15.044417 - Distance 21.259 # 153.42 +/- 4.05 mas - SpectralType "Y0V" - Temperature 300 # approx. - Radius 60000 # approx. - AbsMag 40 # extremely low -} - 114622 # Gliese 892 { - RA 348.32072826 - Dec 57.16835459 - Distance 21.3061 # 153.0808 +/- 0.0895 mas + RA 348.33773395 + Dec 57.16966644 + Distance 21.3364 # 152.8640 +/- 0.0494 mas SpectralType "K3V" AppMag 5.570 } -# BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 -# "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" -# https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta -"WISE 0313+7807:WISE J031325.94+780744.3" +# parameters from Kirkpatrick et al. (2021) +"WISE 0825+2805:WISE J082507.35+280548.5" { - RA 048.358100 - Dec 78.128986 - Distance 21.3 # 153 +/- 15 mas - SpectralType "T8.5V" - Temperature 651 - Radius 61500 + RA 126.280525 + Dec 28.096445 + Distance 21.373 # 152.6 +/- 2.0 mas + SpectralType "Y0.5V" + Temperature 376 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + +# parameters from Kirkpatrick et al. (2021) +"WISE 0410+1502:WISE J041022.71+150248.4" +{ + RA 62.596159 + Dec 15.043733 + Distance 21.557 # 151.3 +/- 2.0 mas + SpectralType "Y0V" + Temperature 451 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + +# parameters from Kirkpatrick et al. (2021) +"2MASS 0521+1025:2MASS J05212615+1025328:WISE J052126.29+102528.4" +{ + RA 80.359997 + Dec 10.423818 + Distance 21.715 # 150.2 +/- 3.0 mas + SpectralType "T7.5" + Temperature 727 + Radius 60000 # approx. AbsMag 40 # extremely low } "LHS 337:Luyten 471-42:GJ 3737" { - RA 189.70457636 - Dec -38.38157547 - Distance 21.7666 # 149.8423 +/- 0.0755 mas + RA 189.70080544 + Dec -38.38740912 + Distance 21.7324 # 150.0781 +/- 0.0322 mas SpectralType "M4.0V" Radius 180000 # approx. for class AppMag 12.74 } +53767 # Ross 104 +{ + RA 165.01567860 + Dec 22.83170230 + Distance 22.0081 # 148.1986 +/- 0.0253 mas + SpectralType "M4V" + Radius 180000 # approx. for class + AppMag 10.020 +} + # Söderhjelm, S. (1999), A&A 341, 121 # "Visual binary orbits and masses post Hipparcos" # http://adsabs.harvard.edu/abs/1999A%26A...341..121S Barycenter 72659 "XI Boo:37 Boo:Gliese 566:ADS 9413" { - RA 222.847018 - Dec 19.100634 - Distance 21.893 # 148.98 +/- 0.48 mas + RA 222.84746520 # mass ratio 0.94:0.67 + Dec 19.10061690 # A: 148.0695 +/- 0.1317 mas + Distance 22.013 # B: 148.1793 +/- 0.0546 mas } 1007221481 "XI Boo A:37 Boo A:Gliese 566 A:ADS 9413 A" @@ -2599,7 +2667,7 @@ Barycenter 72659 "XI Boo:37 Boo:Gliese 566:ADS 9413" EllipticalOrbit { Period 151.6 - SemiMajorAxis 13.80 # mass ratio 0.94:0.67 + SemiMajorAxis 13.87 # mass ratio 0.94:0.67 Eccentricity 0.51 Inclination 83.21 AscendingNode 270.13 @@ -2616,7 +2684,7 @@ Barycenter 72659 "XI Boo:37 Boo:Gliese 566:ADS 9413" EllipticalOrbit { Period 151.6 - SemiMajorAxis 19.36 # mass ratio 0.94:0.67 + SemiMajorAxis 19.47 # mass ratio 0.94:0.67 Eccentricity 0.51 Inclination 83.21 AscendingNode 270.13 @@ -2625,14 +2693,14 @@ Barycenter 72659 "XI Boo:37 Boo:Gliese 566:ADS 9413" } } -53767 # Ross 104 +"Gliese 299:Ross 619" { - RA 165.01773737 - Dec 22.83295740 - Distance 22.0185 # 148.1283 +/- 0.0569 mas - SpectralType "M4V" - Radius 180000 # approx. for class - AppMag 10.020 + RA 122.99468256 + Dec 8.75040152 + Distance 22.0791 # 147.7218 +/- 0.0950 mas + SpectralType "M4.5V" + Radius 160000 # approx. for class + AppMag 12.834 } # Tokovinin et al. (2015), AJ 150 (2), 50 @@ -2643,15 +2711,14 @@ Barycenter 72659 "XI Boo:37 Boo:Gliese 566:ADS 9413" # http://adsabs.harvard.edu/abs/1999A&A...344..897D Barycenter "GJ 3522:Giclas 41-14" { - RA 134.734670 - Dec 8.4739078 + RA 134.73639684 # mass ratio (0.19:0.17):0.17 + Dec 8.47245694 Distance 22.088 # 147.66 +/- 1.98 mas } Barycenter "GJ 3522 A:Giclas 41-14 A" { OrbitBarycenter "Giclas 41-14" - SpectralType "M3.5V" EllipticalOrbit { Period 5.566 @@ -2672,10 +2739,13 @@ Barycenter "GJ 3522 A:Giclas 41-14 A" AppMag 11.94 EllipticalOrbit { - Period 0.021 # 7.6 d + Period 0.0206858 # 7.5555 d SemiMajorAxis 0.0255 # estimated from mass ratio 0.19:0.17 + Eccentricity 0.014 Inclination 156 # guess - to match AscendingNode 234 # plane of AB + ArgOfPericenter 18.2 + MeanAnomaly 43.8 } } @@ -2687,11 +2757,13 @@ Barycenter "GJ 3522 A:Giclas 41-14 A" AppMag 12.14 EllipticalOrbit { - Period 0.021 # 7.6 d + Period 0.0206858 # 7.5555 d SemiMajorAxis 0.0285 # estimated from mass ratio 0.19:0.17 + Eccentricity 0.014 Inclination 156 # guess - to match AscendingNode 234 # plane of AB - ArgOfPericenter 180 + ArgOfPericenter 198.2 + MeanAnomaly 43.8 } } @@ -2718,9 +2790,9 @@ Barycenter "GJ 3522 A:Giclas 41-14 A" # http://adsabs.harvard.edu/abs/1999A&A...344..897D Barycenter 106106 "Gliese 829:Ross 775" { - RA 322.40338336 - Dec 17.64329431 - Distance 22.0954 # 147.6126 +/- 0.0979 mas + RA 322.40807988 + Dec 17.64497780 + Distance 22.1129 # 147.4958 +/- 0.0257 mas } "Gliese 829 A:Ross 775 A" @@ -2731,9 +2803,11 @@ Barycenter 106106 "Gliese 829:Ross 775" AppMag 11.05 EllipticalOrbit { - Period 0.146 # 53.2 d + Period 0.145711 # 53.221 d SemiMajorAxis 0.11 # estimated from mass ratio 0.26:0.26 - ArgOfPericenter 180 + Eccentricity 0.374 + ArgOfPericenter 181.3 + MeanAnomaly 68.9 } } @@ -2745,8 +2819,11 @@ Barycenter 106106 "Gliese 829:Ross 775" AppMag 11.05 EllipticalOrbit { - Period 0.146 # 53.2 d + Period 0.145711 # 53.221 d SemiMajorAxis 0.11 # estimated from mass ratio 0.26:0.26 + Eccentricity 0.374 + ArgOfPericenter 1.3 + MeanAnomaly 68.9 } } @@ -2755,19 +2832,20 @@ Barycenter 106106 "Gliese 829:Ross 775" # https://arxiv.org/abs/1908.06994 Barycenter "Scholz's Star:WISE 0720-0846:WISE J072003.20-084651.2" { - RA 110.01355700 - Dec -8.78052900 - Distance 22.294 # 146.3 +1.2 -1.1 mas + RA 110.01336164 + Dec -8.78107327 + Distance 22.172 # 147.1 +1.1 -1.2 mas } # Apparent magnitude of A from Ivanov et al. (2015), A&A 574, A64 # "Properties of the solar neighbor WISE J072003.20-084651.2" # https://www.aanda.org/articles/aa/abs/2015/02/aa24883-14/aa24883-14.html -"Scholz's Star A:WISE J0720-0846 A:WISE J072003.20-084651.2 A" +"Scholz's Star A:WISE 0720-0846 A:WISE J072003.20-084651.2 A" { OrbitBarycenter "WISE 0720-0846" SpectralType "M9.5V" AppMag 18.266 + Radius 70900 EllipticalOrbit { # fully specified orbit Period 8.06 @@ -2780,11 +2858,12 @@ Barycenter "Scholz's Star:WISE 0720-0846:WISE J072003.20-084651.2" } } -"Scholz's Star B:WISE J0720-0846 B:WISE J072003.20-084651.2 B" +"Scholz's Star B:WISE 0720-0846 B:WISE J072003.20-084651.2 B" { OrbitBarycenter "WISE 0720-0846" SpectralType "T5.5V" AbsMag 32 # for approximate radius in Celestia + Radius 58800 EllipticalOrbit { # fully specified orbit Period 8.06 @@ -2797,33 +2876,47 @@ Barycenter "Scholz's Star:WISE 0720-0846:WISE J072003.20-084651.2" } } -113296 # Ross 671 +"2MASS 1928+2356:2MASS J19284155+2356016" { - RA 344.14501970 - Dec 16.55343159 - Distance 22.3992 # 145.6107 +/- 0.0388 mas - SpectralType "M1.5Ve" - Radius 324000 # approx. for class - AppMag 8.638 + RA 292.17175326 + Dec 23.93500480 + Distance 22.2774 # 146.4067 +/- 1.2001 mas + SpectralType "T6" + AbsMag 33.5 # for approximate radius in Celestia } -# Used parallax of component B, from Gaia DR2 +# parallax from Kirkpatrick et al. (2019), ApJS 240 (2), 19 +# "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an +# Analysis of the Field Substellar Mass Function into the 'Planetary' Mass Regime" +# https://iopscience.iop.org/article/10.3847/1538-4365/aaf6af +"WISE 0254+0223:WISE J025409.51+022358.6" +{ + RA 43.5328583 + Dec 2.3989861 + Distance 22.324 # 146.1 +/- 1.5 mas + SpectralType "T8V" + Temperature 656 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + +# Used parallax of component A, from Gaia EDR3 # Winters et al. (2019), AJ 158 (4), 152 # "Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple # M Dwarf System at 6.9 Parsecs" # https://arxiv.org/abs/1906.10147 Barycenter 14101 "LTT 1445" { - RA 45.46325875 # mass ratio 0.257:(0.215:0.161) - Dec -16.59253611 - Distance 22.4090 + RA 45.46154733 # mass ratio 0.257:(0.215:0.161) + Dec -16.59369072 + Distance 22.3867 # 145.6922 +/- 0.0244 mas } 1006945865 "LTT 1445 A:GJ 3193:LP 771-96:Luyten 730-18:RECONS 4" { - RA 45.46412500 - Dec -16.5933611 - Distance 22.4090 + RA 45.46242451 + Dec -16.59453281 + Distance 22.3867 AppMag 11.22 SpectralType "M3V" Radius 186400 @@ -2831,9 +2924,9 @@ Barycenter 14101 "LTT 1445" Barycenter "LTT 1445 BC:GJ 3192:LP 771-95" { - RA 45.462666667 - Dec -16.59197222 - Distance 22.4090 + RA 45.46094777 + Dec -16.59311514 + Distance 22.3867 } "LTT 1445 B:GJ 3192 A:LP 771-95 A" @@ -2845,7 +2938,7 @@ Barycenter "LTT 1445 BC:GJ 3192:LP 771-95" EllipticalOrbit { Period 36.2 - SemiMajorAxis 3.4096 # mass ratio 0.215:0.161 + SemiMajorAxis 3.41 # mass ratio 0.215:0.161 Eccentricity 0.50 Inclination 70.41 AscendingNode 204.85 @@ -2863,7 +2956,7 @@ Barycenter "LTT 1445 BC:GJ 3192:LP 771-95" EllipticalOrbit { Period 36.2 - SemiMajorAxis 4.5532 # mass ratio 0.215:0.161 + SemiMajorAxis 4.55 # mass ratio 0.215:0.161 Eccentricity 0.50 Inclination 70.41 AscendingNode 204.85 @@ -2872,33 +2965,33 @@ Barycenter "LTT 1445 BC:GJ 3192:LP 771-95" } } -"Gliese 299:Ross 619" +113296 # Ross 671 { - RA 122.98983156 - Dec 8.77305088 - Distance 22.4200 # 145.4757 +/- 0.5695 mas - SpectralType "M4.5V" - Radius 160000 # approx. for class - AppMag 12.834 + RA 344.14022173 + Dec 16.55216937 + Distance 22.3972 # 145.6234 +/- 0.0255 mas + SpectralType "M1.5Ve" + Radius 324000 # approx. for class + AppMag 8.638 } -# parameters from Martin et al. (2018) -"WISE 1405+5534:WISE J140518.39+553421.3" +# parameters from Kirkpatrick et al. (2021) +"CWISE 1055+5443:CWISE J105512.11+544328.3" { - RA 211.322480 - Dec 55.572793 - Distance 22.59 # 144.35 +/- 8.60 mas - SpectralType "Y0V" - Temperature 400 # guess + RA 163.799544 + Dec 54.724527 + Distance 22.494 # 145.0 +/- 14.7 mas + SpectralType "sdT8" + Temperature 686 Radius 60000 # approx. AbsMag 40 # extremely low } 53020 # Wolf 358 { - RA 162.71679684 - Dec 6.80812877 - Distance 22.7291 # 143.4971 +/- 0.0626 mas + RA 162.71296407 + Dec 6.80448954 + Distance 22.7225 # 143.5391 +/- 0.0286 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 11.675 @@ -2909,185 +3002,174 @@ Modify 51317 # Gliese 393 Radius 305000 # approx. for class } -"2MASS 2146+3813:2MASS J21462206+3813047" -{ - RA 326.59196805 - Dec 38.21804860 - Distance 22.9603 # 142.0522 +/- 0.0513 mas - SpectralType "M5V" - Radius 140000 # approx. for class - AppMag 12.210 -} - Modify 103096 # Gliese 809 { Radius 341000 # approx. for class } +"2MASS 2146+3813:2MASS J21462206+3813047" +{ + RA 326.59288194 + Dec 38.21751708 + Distance 22.9858 # 141.8946 +/- 0.0212 mas + SpectralType "M5V" + Radius 140000 # approx. for class + AppMag 12.210 +} + "GJ 3877:LP 914-54" { - RA 224.15943498 - Dec -28.16350623 - Distance 23.0196 # 141.6865 +/- 0.1063 mas + RA 224.15695945 + Dec -28.16725415 + Distance 23.0029 # 141.7891 +/- 0.0617 mas SpectralType "M7.0V" Radius 84000 # approx. for class AppMag 17.141 } -"GJ 1068:Luyten 230-188" -{ - RA 62.61718071 - Dec -53.60226063 - Distance 23.2047 # 140.5559 +/- 0.0354 mas - SpectralType "M4.5V" - Radius 160000 # approx. for class - AppMag 13.58 -} - -"GJ 1286" -{ - RA 353.79359235 - Dec -2.38905966 - Distance 23.4122 # 139.3100 +/- 0.1066 mas - SpectralType "M5.0V" - Radius 140000 # approx. for class - AppMag 14.69 -} - -# parameters from Martin et al. (2018) -"WISE 0825+2805:WISE J082507.35+280548.5" -{ - RA 126.280554 - Dec 28.096545 - Distance 23.461 # 139.02 +/- 4.33 mas - SpectralType "Y0.5V" - Radius 60000 # approx. - AbsMag 40 # extremely low -} - -# low-quality parallax from Theissen, C. A. (2018), ApJ 862 (2), 173 -# "Parallaxes of Cool Objects with WISE: Filling in for Gaia" -# http://iopscience.iop.org/article/10.3847/1538-4357/aaccfa/meta -"WISE 0254+0223:WISE J025409.51+022358.6" -{ - RA 43.5328583 - Dec 2.3989861 - Distance 23.5 # 139 +/- 40 mas - SpectralType "T8V" - Temperature 500 # approx. - Radius 60000 # approx. - AbsMag 40 # extremely low -} - -"V488 Hya:2MASS J08354256-0819237" -{ - RA 128.92721804 - Dec -8.32316374 - Distance 23.5305 # 138.6098 +/- 0.2781 mas - SpectralType "L6.5V" - AbsMag 21.5 # for approximate radius in Celestia -} - -# Distance from average of distances from Gaia DR2 parallax for A and B -Barycenter "Gliese 105" # orbit of (AB) and C unknown -{ - RA 39.028581069 # mass ratio (0.81:0.082):0.21 - Dec 6.883949884 # A: 138.2084 +/- 0.1436 mas - Distance 23.591 # B: 138.4637 +/- 0.0886 mas -} - -# Masses from Golimowski et al. (2002), AJ 120 (4), 2082 -# "The Very Low Mass Component of the Gliese 105 System" -# https://iopscience.iop.org/article/10.1086/301567 -Barycenter 12114 "Gliese 105 A" -{ - RA 39.020334067 # mass ratio 0.81:0.082 - Dec 6.886846623 - Distance 23.599 # 138.2084 +/- 0.1436 mas -} - -"Gliese 105 Aa" -{ - OrbitBarycenter "Gliese 105 A" - SpectralType "K3V" - AppMag 5.81 - - EllipticalOrbit { - Period 61 - SemiMajorAxis 0.11 # mass ratio 0.81:0.082 - Eccentricity 0.67 - Inclination 61 - AscendingNode 356 - ArgOfPericenter 174 - MeanAnomaly 354 - } -} - -"Gliese 105 Ab" # SIMBAD calls it GJ 105 C -{ - OrbitBarycenter "Gliese 105 A" - SpectralType "M7V" - AppMag 16.77 - - EllipticalOrbit { - Period 61 - SemiMajorAxis 1.13 # mass ratio 0.81:0.082 - Eccentricity 0.67 - Inclination 61 - AscendingNode 356 - ArgOfPericenter 354 - MeanAnomaly 354 - } -} - -"BX Cet:Gliese 105 B" -{ - RA 39.06361119 - Dec 6.87164564 - Distance 23.555 # parallax: 138.4637 +/- 0.0886 mas - AppMag 11.664 - SpectralType "M3.5V" - Radius 225000 # approx. for class -} - -# parameters from Martin et al. (2018) +# parameters from Kirkpatrick et al. (2021) # BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 # "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" # https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta "WISE 2056+1459:WISE J205628.91+145953.2" { - RA 314.120498 - Dec 14.998118 - Distance 23.580 # 138.32 +/- 3.86 mas + RA 314.121593 + Dec 14.998858 + Distance 23.165 # 140.8 +/- 2.0 mas SpectralType "Y0V" Temperature 407 Radius 65000 AbsMag 40 # extremely low } +"GJ 1068:Luyten 230-188" +{ + RA 62.61100026 + Dec -53.61299677 + Distance 23.1816 # 140.6961 +/- 0.0214 mas + SpectralType "M4.5V" + Radius 160000 # approx. for class + AppMag 13.58 +} + +# parameters from Kirkpatrick et al. (2021) +"WISE 0049+2151:WISE J004945.61+215120.0" +{ + RA 12.439534 + Dec 21.855377 + Distance 23.231 # 140.4 +/- 2.1 mas + SpectralType "T8.5" + Temperature 640 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + +"GJ 1286" +{ + RA 353.79706944 + Dec -2.39279939 + Distance 23.4074 # 139.3389 +/- 0.0441 mas + SpectralType "M5.0V" + Radius 140000 # approx. for class + AppMag 14.69 +} + +# Used Gaia EDR3 parallax for B +Barycenter "Gliese 105" # orbit of (AC) and B unknown +{ + RA 39.03674095 # mass ratio (0.78:102.6J):0.21 + Dec 6.89039568 + Distance 23.5599 # 138.4371 +/- 0.0420 mas +} + +# Feng et al. (2021), MNRAS 507 (2), 2856 +# "Optimized modelling of Gaia-Hipparcos astrometry for the detection of the +# smallest cold Jupiter and confirmation of seven low-mass companions" +# https://arxiv.org/abs/2107.14056 +Barycenter 12114 "Gliese 105 AC" +{ + RA 39.02838451 + Dec 6.89333911 + Distance 23.5599 +} + +"Gliese 105 A" +{ + OrbitBarycenter "Gliese 105 AC" + SpectralType "K3V" + AppMag 5.81 + + EllipticalOrbit { # fully specified orientation + Period 76.107 + SemiMajorAxis 1.9 # mass ratio 0.78:102.6J + Eccentricity 0.641 + Inclination 110.5 + AscendingNode 344.9 + ArgOfPericenter 8.3 + MeanAnomaly 273.7 + } +} + +"Gliese 105 C" +{ + OrbitBarycenter "Gliese 105 AC" + SpectralType "M7V" + AppMag 16.77 + + EllipticalOrbit { # fully specified orientation + Period 76.107 + SemiMajorAxis 15.1 # mass ratio 0.78:102.6J + Eccentricity 0.641 + Inclination 110.5 + AscendingNode 344.9 + ArgOfPericenter 188.3 + MeanAnomaly 273.7 + } +} + +"BX Cet:Gliese 105 B" +{ + RA 39.07167733 + Dec 6.87808990 + Distance 23.5599 + AppMag 11.664 + SpectralType "M3.5V" + Radius 225000 # approx. for class +} + +"V488 Hya:2MASS J08354256-0819237" +{ + RA 128.92481210 + Dec -8.32181827 + Distance 23.5807 # 138.3147 +/- 0.2145 mas + SpectralType "L6.5V" + AbsMag 21.5 # for approximate radius in Celestia +} + "GJ 4274:Luyten 788-34" { - RA 335.77915456 - Dec -17.60731501 - Distance 23.6040 # 138.1782 +/- 0.2484 mas + RA 335.78059284 + Dec -17.61050757 + Distance 23.5955 # 138.2280 +/- 0.0482 mas SpectralType "M4.5Ve" Radius 160000 # approx. for class AppMag 13.30 } -# Used parallax of component C from Gaia DR2 -Barycenter "Gliese 667:CD-34 11626" # orbit of (AB) & C unknown +# Used parallax of component C from Gaia EDR3 +# orbit listed for AB-C in Sixth Catalog yields unrealistically high mass sum +Barycenter "Gliese 667:CD-34 11626" { - RA 259.7396833 # mass ratio (0.68:0.59):0.35 - Dec -34.99129014 - Distance 23.6316 + RA 259.74581449 # mass ratio (0.68:0.59):0.35 + Dec -34.99176542 + Distance 23.6232 # 138.0663 +/- 0.0283 mas } Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" { - RA 259.7381868 - Dec -34.9897615 - Distance 23.6316 # 138.0171 +/- 0.0918 mas + RA 259.74431576 + Dec -34.99010370 + Distance 23.6232 } 1008507370 "Gliese 667 A:CD-34 11626 A" @@ -3098,7 +3180,7 @@ Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" EllipticalOrbit { Period 42.15 - SemiMajorAxis 5.98 # mass ratio 0.68:0.59 + SemiMajorAxis 6.09 # mass ratio 0.68:0.59 Eccentricity 0.58 Inclination 136.65 AscendingNode 305.37 @@ -3115,7 +3197,7 @@ Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" EllipticalOrbit { Period 42.15 - SemiMajorAxis 7.13 # mass ratio 0.68:0.59 + SemiMajorAxis 7.02 # mass ratio 0.68:0.59 Eccentricity 0.58 Inclination 136.65 AscendingNode 305.37 @@ -3126,9 +3208,9 @@ Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" "Gliese 667 C:CD-34 11626 C" { - RA 259.74511327 - Dec -34.99683693 - Distance 23.6316 + RA 259.75125274 + Dec -34.99779509 + Distance 23.6232 SpectralType "M1.5V" Radius 324000 # approx. for class AppMag 10.22 @@ -3136,119 +3218,77 @@ Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" "WISE 0607+2429:WISEP J060738.65+242953.4" { - RA 91.91259273 - Dec 24.49911608 - Distance 23.8166 # 136.9449 +/- 0.6553 mas + RA 91.91027347 + Dec 24.49769409 + Distance 23.6240 # 138.0616 +/- 0.5185 mas SpectralType "L9V" AbsMag 23 # approx. for radius in Celestia } -# parameters from Martin et al. (2018) +# parameters from Kirkpatrick et al. (2021) # BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 # "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" # https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta -"WISE 1738+2732:WISE J173835.53+273259.0" +"WISE 0313+7807:WISE J031325.94+780744.3" { - RA 264.648060 - Dec 27.549749 - Distance 23.936 # 136.26 +/- 4.27 mas - SpectralType "Y0V" - Temperature 409 - Radius 64300 + RA 48.359149 + Dec 78.129087 + Distance 24.053 # 135.6 +/- 2.8 mas + SpectralType "T8.5V" + Temperature 651 + Radius 61500 AbsMag 40 # extremely low } "2MASS 1507-1627:2MASS J15074769-1627386" { - RA 226.94864865 - Dec -16.46114400 - Distance 24.1180 # 135.2332 +/- 0.3274 mas + RA 226.94794580 + Dec -16.46512505 + Distance 24.1691 # 134.9474 +/- 0.2611 mas SpectralType "L5V" - AbsMag 21 # for approximate radius in Celestia -} - -# Delfosse et al. (1999), A&A 344, 897 -# "New neighbours. I. 13 new companions to nearby M dwarfs" -# http://adsabs.harvard.edu/abs/1999A&A...344..897D -Barycenter 83945 "GJ 3991:Giclas 203-47" -{ - RA 257.38142860 - Dec 43.68131523 - Distance 24.2320 # 134.5971 +/- 0.4894 mas -} - -"GJ 3991 A:Giclas 203-47 A" -{ - OrbitBarycenter "Giclas 203-47" - SpectralType "M3.5V" - Radius 225000 # approx. for class - AppMag 11.80 - - EllipticalOrbit { - Period 0.04 # 15 d - SemiMajorAxis 0.6 # estimated from mass ratio 0.3:0.5 - Eccentricity 0.07 - ArgOfPericenter 180 - } -} - -"GJ 3991 B:Giclas 203-47 B" -{ - OrbitBarycenter "Giclas 203-47" - SpectralType "D" - AbsMag 13.7 # for a 0.5-solar-mass white dwarf - - EllipticalOrbit { - Period 0.04 # 15 d - SemiMajorAxis 0.4 # estimated from mass ratio 0.3:0.5 - Eccentricity 0.07 - } + Radius 60000 # approx. + AppMag 22.136 } 3765 # HD 4628 { - RA 12.09573477 - Dec 5.28061376 - Distance 24.2497 # 134.4990 +/- 0.0890 mas + RA 12.09910708 + Dec 5.27553945 + Distance 24.2505 # 134.4948 +/- 0.0578 mas SpectralType "K2.5V" AppMag 5.74 } -# apparent magnitude from Henry et al. (2006) AJ 132 (6), 2360 -# "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: -# 20 New Members of the RECONS 10 Parsec Sample" -# http://iopscience.iop.org/1538-3881/132/6/2360/pdf/1538-3881_132_6_2360.pdf -"GJ 4248:LHS 3746:Luyten 499-46" -{ - RA 330.6223980 - Dec -37.0809310 - Distance 24.287 # 134.29 +/- 1.31 mas - SpectralType "M3.0V" - Radius 270000 # approx. for class - AppMag 11.76 -} - -Modify 106255 # Wolf 922 -{ - Radius 160000 # approx. for class -} - +# Used Hipparcos parallax instead 2021 # Bet Hyi { - RA 6.43779316 - Dec -77.25424612 + RA 6.48250499 + Dec -77.25279547 Distance 24.327 # 134.07 +/- 0.11 mas SpectralType "G0V" AppMag 2.79 } +# parameters from Kirkpatrick et al. (2021) +"WISE 2000+3629:WISE J200050.19+362950.1" +{ + RA 300.209094 + Dec 36.497796 + Distance 24.450 # 133.4 +/- 2.2 mas + SpectralType "T8" + Temperature 765 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + # Parameters from Bond et al. (2020), ApJ 904 (2), 112 # "Hubble Space Telescope Astrometry of the Metal-poor Visual Binary μ Cassiopeiae: # Dynamical Masses, Helium Content, and Age" +# https://iopscience.iop.org/article/10.3847/1538-4357/abc172 Barycenter 5336 "MU Cas:30 Cas:Gliese 53" { - RA 17.06831127 - Dec 54.9203406 + RA 17.09474986 + Dec 54.91320398 Distance 24.586 # 132.66 +/- 0.69 mas } @@ -3287,35 +3327,74 @@ Barycenter 5336 "MU Cas:30 Cas:Gliese 53" } } +# Delfosse et al. (1999), A&A 344, 897 +# "New neighbours. I. 13 new companions to nearby M dwarfs" +# http://adsabs.harvard.edu/abs/1999A&A...344..897D +Barycenter 83945 "GJ 3991:Giclas 203-47" +{ + RA 257.38347212 + Dec 43.68010581 + Distance 24.7840 # 131.5996 +/- 0.4285 mas +} + +"GJ 3991 A:Giclas 203-47 A" +{ + OrbitBarycenter "Giclas 203-47" + SpectralType "M3.5V" + Radius 225000 # approx. for class + AppMag 11.80 + + EllipticalOrbit { + Period 0.0402836 # 14.7136 d + SemiMajorAxis 0.065 # estimated from mass ratio 0.35:0.5 + Eccentricity 0.068 + ArgOfPericenter 332.0 + MeanAnomaly 348.6 + } +} + +"GJ 3991 B:Giclas 203-47 B" +{ + OrbitBarycenter "Giclas 203-47" + SpectralType "D" + AbsMag 13.7 # for a 0.5-solar-mass white dwarf + + EllipticalOrbit { + Period 0.0402836 # 14.7136 d + SemiMajorAxis 0.046 # estimated from mass ratio 0.35:0.5 + Eccentricity 0.068 + ArgOfPericenter 152.0 + MeanAnomaly 348.6 + } +} + +113283 # TW PsA (Fomalhaut B) +{ + RA 344.10194140 + Dec -31.56626896 + Distance 24.7929 # 131.5525 +/- 0.0275 mas + SpectralType "K4Ve" + AppMag 6.48 +} + +# Used Gaia DR2 parallax instead 7981 # 107 Psc { - RA 25.62401456 - Dec 20.26851674 + RA 25.62258569 + Dec 20.26551918 Distance 24.8046 # 131.4903 +/- 0.1515 mas SpectralType "K1V" AppMag 5.24 } -# Rotational parameters based on disk parameters, from -# MacGregor et al. (2017), ApJ 842 (1), 8 -# "A Complete ALMA Map of the Fomalhaut Debris Disk" -# https://arxiv.org/abs/1705.05867 -Modify 113368 # Fomalhaut +"Giclas 141-36" { - UniformRotation - { - Inclination 83.2 # rotation pole matches debris disk - AscendingNode 177.5 # inclination 65.6 deg, position angle 337.9 deg - } -} - -113283 # TW PsA (Fomalhaut B) -{ - RA 344.10022206 - Dec -31.56556530 - Distance 24.8144 # 131.4380 +/- 0.0856 mas - SpectralType "K4Ve" - AppMag 6.48 + RA 282.07475874 + Dec 7.69032389 + Distance 24.8445 # 131.2790 +/- 0.0398 mas + SpectralType "M5.0V" + Radius 140000 # approx. for class + AppMag 14.248 } Modify 65859 # Ross 490 @@ -3323,31 +3402,62 @@ Modify 65859 # Ross 490 Radius 341000 # approx. for class } -"Giclas 141-36" +# parameters from Kirkpatrick et al. (2021) +# BT-Settl model parameters from Beichman et al. (2014), ApJ 783 (2), 68 +# "WISE Y Dwarfs as Probes of the Brown Dwarf-Exoplanet Connection" +# https://iopscience.iop.org/article/10.1088/0004-637X/783/2/68/meta +"WISE 1738+2732:WISE J173835.53+273259.0" { - RA 282.07307098 - Dec 7.68921596 - Distance 24.8596 # 131.1990 +/- 0.0788 mas - SpectralType "M5.0V" - Radius 140000 # approx. for class - AppMag 14.248 + RA 264.648568 + Dec 27.549203 + Distance 24.916 # 130.9 +/- 2.1 mas + SpectralType "Y0V" + Temperature 409 + Radius 64300 + AbsMag 40 # extremely low } "GJ 4053:LP 71-165" { - RA 274.73846839 - Dec 66.19258373 - Distance 24.9408 # 130.7722 +/- 0.0443 mas + RA 274.74325648 + Dec 66.19061665 + Distance 24.9254 # 130.8531 +/- 0.0217 mas SpectralType "M4.5V" Radius 160000 # approx. for class AppMag 13.406 } +# parameters from Kirkpatrick et al. (2021) +"WISE 2354+0240:WISEA J235402.79+024014.1" +{ + RA 358.512498 + Dec 2.669898 + Distance 24.974 # 130.6 +/- 3.3 mas + SpectralType "Y1" + Temperature 388 + Radius 60000 # approx. + AbsMag 40 # extremely low +} + +# apparent magnitude from Henry et al. (2006) AJ 132 (6), 2360 +# "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: +# 20 New Members of the RECONS 10 Parsec Sample" +# http://iopscience.iop.org/1538-3881/132/6/2360/pdf/1538-3881_132_6_2360.pdf +"GJ 4248:LHS 3746:Luyten 499-56" +{ + RA 330.62692304 + Dec -37.08193914 + Distance 25.0084 # 130.4186 +/- 0.0534 mas + SpectralType "M3.0V" + Radius 270000 # approx. for class + AppMag 11.76 +} + "Fomalhaut C:ALF PsA C:LP 876-10" { - RA 342.01871887 - Dec -24.36881191 - Distance 25.0305 # 130.3032 +/- 0.0746 mas + RA 342.02033817 + Dec -24.36962742 + Distance 25.0368 # 130.2707 +/- 0.0325 mas SpectralType "M4.0Ve" Radius 160000 # approx. for class AppMag 12.624 @@ -3358,6 +3468,8 @@ Modify 65859 # Ross 490 # https://arxiv.org/abs/1211.6055 Modify 91262 # Vega { + Radius 1896000 # equatorial radius + SemiAxes [ 1 0.887 1 ] # equatorial radius 12.7% greater than polar UniformRotation @@ -3373,6 +3485,19 @@ Modify 12781 # Gliese 109 Radius 225000 # approx. for class } +# Rotational parameters based on disk parameters, from +# MacGregor et al. (2017), ApJ 842 (1), 8 +# "A Complete ALMA Map of the Fomalhaut Debris Disk" +# https://arxiv.org/abs/1705.05867 +Modify 113368 # Fomalhaut +{ + UniformRotation + { + Inclination 83.2 # rotation pole matches debris disk + AscendingNode 177.5 # inclination 65.6 deg, position angle 337.9 deg + } +} + #======================================================================== # Nearby multiple star with poor Hipparcos parallax @@ -3425,11 +3550,11 @@ Barycenter 2026342520 "Alula Australis B:XI UMa B:53 UMa B:Gliese 423 B:ADS 8119 EllipticalOrbit { # fully specified orientation Period 1.834 - SemiMajorAxis 0.13 # mass ratio 0.98:0.38 + SemiMajorAxis 0.47 # mass ratio 0.98:0.38 Eccentricity 0.61 - Inclination 146.3 - AscendingNode 203.8 - ArgOfPericenter 285.2 + Inclination 32.2 + AscendingNode 21.4 + ArgOfPericenter 4.7 MeanAnomaly 73.4 } } @@ -3442,11 +3567,11 @@ Barycenter 2026342520 "Alula Australis B:XI UMa B:53 UMa B:Gliese 423 B:ADS 8119 EllipticalOrbit { # fully specified orientation Period 1.834 - SemiMajorAxis 0.34 # mass ratio 0.98:0.38 + SemiMajorAxis 1.21 # mass ratio 0.98:0.38 Eccentricity 0.61 - Inclination 146.3 - AscendingNode 203.8 - ArgOfPericenter 105.2 + Inclination 32.2 + AscendingNode 21.4 + ArgOfPericenter 184.7 MeanAnomaly 73.4 } } @@ -3458,16 +3583,18 @@ Barycenter 2026342520 "Alula Australis B:XI UMa B:53 UMa B:Gliese 423 B:ADS 8119 AppMag 4.8 EllipticalOrbit { - Period 0.0109 # 3.981 d + Period 0.010898034 # 3.980507 d SemiMajorAxis 0.008 # mass ratio 0.88:0.17 Eccentricity 0 Inclination 102 # plane-of-inclination: AscendingNode 70 # 12.7 deg - ArgOfPericenter 180 + ArgOfPericenter 347.3 + MeanAnomaly 329.2 } UniformRotation { - Inclination 102 # guess, to match orbit + Period 95.532168 # guess, to match orbit + Inclination 102 AscendingNode 70 } } @@ -3480,29 +3607,34 @@ Barycenter 2026342520 "Alula Australis B:XI UMa B:53 UMa B:Gliese 423 B:ADS 8119 AbsMag 11.3 # for approximate radius in Celestia EllipticalOrbit { - Period 0.0109 # 3.981 d + Period 0.010898034 # 3.980507 d SemiMajorAxis 0.056 # mass ratio 0.88:0.17 Eccentricity 0 Inclination 102 # plane-of-inclination: AscendingNode 70 # 12.7 deg + ArgOfPericenter 167.3 + MeanAnomaly 329.2 } UniformRotation { - Inclination 102 # guess, to match orbit + Period 95.532168 # guess, to match orbit + Inclination 102 AscendingNode 70 } } # Gaia DR2 suggests WDS J11182+3132C is an optical pair -# Wright et al. (2013), A T8.5 Brown Dwarf Member of the xi Ursae Majoris System" -# https://iopscience.iop.org/1538-3881/145/3/84/ +# radius and temperature from Zhang et al. (2021), ApJ 911 (1), 7 +# "The Hawaii Infrared Parallax Program. V. New T-dwarf Members and Candidate +# Members of Nearby Young Moving Groups" +# https://iopscience.iop.org/article/10.3847/1538-4357/abe3fa "Alula Australis C:WISE 1118+3125:WISE J111838.70+312537.9" { RA 169.66125400 Dec 31.42720000 Distance 28.4885 SpectralType "T8.5V" - Temperature 600 # approx. - Radius 60000 # approx. + Temperature 584 + Radius 63000 AbsMag 40 # extremely low } \ No newline at end of file