# Nearby stars and star orbits out to 25 light years, supplementary # 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 # 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. # 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. # 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 # value of 40, and their radii have also been set to a value around ~1 Jupiter # 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 # below. # For binary orbits, the direction of an orbit's node on the plane of the # sky is often unknown - the orbits given below will appear correct when # viewed from Earth, but the true orbit may be tilted either towards or away from # the Earth. # For a few orbits the nature of the node is known - these are # marked with the phrase "fully specified orientation". # Barycenter positions are based on mass estimates from the papers themselves. The # values used are listed below. Barycenter "Solar System Barycenter:SSB" { RA 0 Dec 0 Distance 0 } 0 "Sol:Sun" { OrbitBarycenter "Solar System Barycenter" CustomOrbit "vsop87-sun" SpectralType "G2V" AbsMag 4.83 Temperature 5772 BoloCorrection -0.08 UniformRotation { Period 609.12 # 25.38 days Inclination 7.25 AscendingNode 75.77 MeridianAngle 23.00 # standard meridian } } 70890 # Proxima Cen { RA 217.42893801 Dec -62.67949189 Distance 4.2441 # 768.5004 +/- 0.2030 mas SpectralType "M5.5Ve" AppMag 11.09 } # Distance from the same source as orbits Barycenter "ALF Cen:Gliese 559" { RA 219.8993053 # mass ratio 1.133:0.972 Dec -60.8356249 Distance 4.3897 # 743 +/- 1.3 mas } 71683 # ALF Cen A { OrbitBarycenter "ALF Cen" SpectralType "G2V" AppMag 0.01 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 } } 71681 # ALF Cen B { OrbitBarycenter "ALF Cen" SpectralType "K1V" AppMag 1.33 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 } } 87937 # Barnard's Star { RA 269.45208250 Dec 4.69336427 Distance 5.9577 # 547.4506 +/- 0.2899 mas SpectralType "M4V" AppMag 9.511 } # Lazorenko & Sahlmann (2018), A&A 618, A111 # "Updated astrometry and masses of the LUH 16 brown dwarf binary" # https://arxiv.org/abs/1808.07835 Barycenter "Luhman 16:WISE 1049-5319:WISE J104915.57-531906.1" { RA 162.328812 Dec -53.319467 Distance 6.5029 # 501.557 +/- 0.082 mas } "Luhman 16 A:WISE 1049-5319 A:WISE J104915.57-531906.1 A" { OrbitBarycenter "Luhman 16" SpectralType "L7.5" AbsMag 23 # for approximate radius in Celestia EllipticalOrbit { # fully specified orientation Period 27.54 SemiMajorAxis 1.64 # mass ratio 33.51J:28.55J Eccentricity 0.34 Inclination 135.69 AscendingNode 118.66 ArgOfPericenter 136.22 MeanAnomaly 127.58 } } "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 EllipticalOrbit { # fully specified orientation Period 27.54 SemiMajorAxis 1.92 # mass ratio 33.51J:28.55J Eccentricity 0.34 Inclination 135.69 AscendingNode 118.66 ArgOfPericenter 316.22 MeanAnomaly 127.58 } } "WISE 0855-0714:WISE J085510.83-071442.5" { RA 133.795125 Dec -7.2451389 Distance 7.264 # 449 +/- 8 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 SpectralType "M6V" AppMag 13.507 } 54035 # Lalande 21185 { RA 165.83414166 Dec 35.96988004 Distance 8.3067 # 392.64 +/- 0.67 mas SpectralType "M2V" AppMag 7.520 } # Parameters from Bond et al. (2017), ApJ 840 (2), 70 # "The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and # Ground-based Astrometry" # https://iopscience.iop.org/article/10.3847/1538-4357/aa6af8 Barycenter 32349 "Sirius:Alhabor:ALF CMa:9 CMa:Gliese 244:ADS 5423" { RA 101.28715533 Dec -16.71611586 Distance 8.608 # 378.9 +/- 1.4 mas } "Sirius A:Alhabor A:ALF CMa A:9 CMa A:Gliese 244 A:ADS 5423 A" { OrbitBarycenter "Sirius" SpectralType "A1V" AppMag -1.46 EllipticalOrbit { # fully specified orientation Period 50.1284 SemiMajorAxis 9.13 # mass ratio 2.063:1.018 Eccentricity 0.59142 Inclination 97.01 AscendingNode 161.67 ArgOfPericenter 5.90 MeanAnomaly 38.99 } } "Sirius B:Alhabor B:ALF CMa B:9 CMa B:Gliese 244 B:ADS 5423 B" { OrbitBarycenter "Sirius" SpectralType "DA2" AppMag 8.44 EllipticalOrbit { # fully specified orientation Period 50.1284 SemiMajorAxis 10.65 # mass ratio 2.063:1.018 Eccentricity 0.59142 Inclination 97.01 AscendingNode 161.67 ArgOfPericenter 185.90 MeanAnomaly 38.99 } } # Distance and radii from same source as orbit # Rotation periods from Barnes et al. (2017), MNRAS 471 (1), 811 # "Surprisingly different star-spot distributions on the near equal-mass # equal-rotation-rate stars in the M dwarf binary GJ 65 AB" # 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 } "BL Cet:Gliese 65 A:Luyten 726-8 A" { OrbitBarycenter "Gliese 65" SpectralType "M5.5V" AppMag 12.7 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 MeanAnomaly 21.93 } RotationPeriod 5.76 } "UV Cet:Gliese 65 B:Luyten 726-8 B" { OrbitBarycenter "Gliese 65" SpectralType "M6V" AppMag 13.2 Radius 110600 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 MeanAnomaly 21.93 } RotationPeriod 5.52 } 92403 # Ross 154 { RA 282.45568250 Dec -23.83623710 Distance 9.7035 # 336.1228 +/- 0.0641 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 SpectralType "M5.0V" AppMag 12.28 } 16537 # Eps Eri { RA 53.23268735 Dec -9.45825866 Distance 10.489 # 310.94 +/- 0.16 mas SpectralType "K2V" AppMag 3.73 } 114046 # Lacaille 9352 { RA 346.46681439 Dec -35.85307188 Distance 10.7211 # 304.2190 +/- 0.0451 mas SpectralType "M2V" AppMag 7.34 } 57548 # Ross 128 { RA 176.93498695 Dec 0.80455693 Distance 11.0074 # 296.3073 +/- 0.0699 mas SpectralType "M4V" AppMag 11.153 } # 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 "Gliese 866:Luyten 789-6" { RA 339.6399000 Dec -15.2999325 Distance 11.109 # 293.6 +/- 0.9 mas } Barycenter "Gliese 866 A:Luyten 789-6 A" { OrbitBarycenter "Gliese 866" EllipticalOrbit { # fully specified orientation Period 2.2537 SemiMajorAxis 0.415 # mass ratio (0.1187:0.0930):0.1145 Eccentricity 0.439 Inclination 89.43 AscendingNode 358.27 ArgOfPericenter 61.70 MeanAnomaly 243.55 } } "EZ Aqr:Gliese 866 Aa:Luyten 789-6 Aa" { OrbitBarycenter "Gliese 866 A" SpectralType "M5V" AppMag 13.03 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 } } "Gliese 866 Ab:Luyten 789-6 Ab" { OrbitBarycenter "Gliese 866 A" SpectralType "M7V" # from mass AppMag 15.07 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 } } "Gliese 866 B:Luyten 789-6 B" { OrbitBarycenter "Gliese 866" SpectralType "M6V" # from apparent magnitude AppMag 13.27 EllipticalOrbit { # fully specified orientation Period 2.2537 SemiMajorAxis 0.768 # mass ratio (0.1187:0.0930):0.1145 Eccentricity 0.439 Inclination 89.43 AscendingNode 358.27 ArgOfPericenter 241.70 MeanAnomaly 243.55 } } # Physical parameters from Kervella et al. (2008), A&A 488 (2), 667 # "The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR # interferometry and CESAM2k modeling" # 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 } 104214 "61 Cyg A:V1803 Cyg:Gliese 820 A:ADS 14636 A" { OrbitBarycenter "61 Cyg" SpectralType "K5V" AppMag 5.21 Radius 462600 EllipticalOrbit { Period 618.7 SemiMajorAxis 41.23 # mass ratio 0.69:0.605 Eccentricity 0.54 Inclination 101 AscendingNode 295 ArgOfPericenter 281 MeanAnomaly 175 } } 104217 "61 Cyg B:Gliese 820 B:ADS 14636 B" { OrbitBarycenter "61 Cyg" SpectralType "K7V" AppMag 6.03 Radius 413900 EllipticalOrbit { Period 618.7 SemiMajorAxis 47.02 # mass ratio 0.69:0.605 Eccentricity 0.54 Inclination 101 AscendingNode 295 ArgOfPericenter 101 MeanAnomaly 175 } } # 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 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 } "Procyon A:Elgomaisa A:ALF CMi A:10 CMi A:Gliese 280 A:ADS 6251 A" { OrbitBarycenter "Procyon" SpectralType "F5IV" AppMag 0.37 EllipticalOrbit { # fully specified orientation Period 40.84 SemiMajorAxis 4.32 # mass ratio 1.478:0.592 Eccentricity 0.40 Inclination 42.58 AscendingNode 25.26 ArgOfPericenter 90.19 MeanAnomaly 281.41 } } "Procyon B:Elgomaisa B:ALF CMi B:10 CMi B:Gliese 280 B:ADS 6251 B" { OrbitBarycenter "Procyon" SpectralType "DA" AppMag 10.7 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 MeanAnomaly 281.41 } } # 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 "Gliese 725:Struve 2398:ADS 11632" { RA 280.6949398 # mass ratio 0.334:0.248 Dec 59.6288903 Distance 11.488 } 91768 "Gliese 725 A:Struve 2398 A:ADS 11632 A" { OrbitBarycenter "ADS 11632" SpectralType "M3V" AppMag 8.91 EllipticalOrbit { Period 408 SemiMajorAxis 20.83 # mass ratio 0.334:0.248 Eccentricity 0.53 Inclination 111.9 AscendingNode 146.1 ArgOfPericenter 243.5 MeanAnomaly 198.5 } } 91772 "Gliese 725 B:Struve 2398 B:ADS 11632 B" { OrbitBarycenter "ADS 11632" SpectralType "M3.5V" AppMag 9.69 EllipticalOrbit { Period 408 SemiMajorAxis 28.06 # mass ratio 0.334:0.248 Eccentricity 0.53 Inclination 111.9 AscendingNode 146.1 ArgOfPericenter 63.5 MeanAnomaly 198.5 } } # Pinamonti et al. (2018), A&A 617, A104 # "The HADES RV Programme with HARPS-N at TNG. VIII. GJ15A: a multiple # wide planetary system sculpted by binary interaction" # 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 } "GX And:Gliese 15 A:Groombridge 34 A:ADS 246 A" { OrbitBarycenter "Groombridge 34" SpectralType "M2V" AppMag 8.13 Radius 264400 EllipticalOrbit { Period 1230 SemiMajorAxis 26.32 # mass ratio 0.38:0.15 Eccentricity 0.53 Inclination 172 AscendingNode 194 ArgOfPericenter 75 MeanAnomaly 296 } } "GQ And:Gliese 15 B:Groombridge 34 B:ADS 246 B" { OrbitBarycenter "Groombridge 34" SpectralType "M3.5V" AppMag 11.04 Radius 125200 EllipticalOrbit { Period 1230 SemiMajorAxis 66.68 # mass ratio 0.38:0.15 Eccentricity 0.53 Inclination 172 AscendingNode 194 ArgOfPericenter 255 MeanAnomaly 296 } } "DX Cnc:GJ 1111:Giclas 51-15" { RA 127.45563677 Dec 26.77600744 Distance 11.6780 # 279.2901 +/- 0.1345 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 } 108870 "EPS Ind A:Gliese 845 A" { RA 330.84022596 Dec -56.7859825 Distance 11.8686 # 274.8048 +/- 0.2494 mas SpectralType "K5V" AppMag 4.69 } # Dieterich et al. (2018) "Dynamical Masses of ε Indi B and C: Two Massive # Brown Dwarfs at the Edge of the Stellar–substellar Boundary" # https://arxiv.org/abs/1807.09880 Barycenter "EPS Ind B:CI Ind:Gliese 845 B" { RA 331.0438333 Dec -56.782694 Distance 11.780 # 276.88 +/- 0.81 mas } "EPS Ind Ba:CI Ind A:Gliese 845 Ba" { OrbitBarycenter "EPS Ind B" SpectralType "T1.5V" Temperature 1280 AbsMag 34.5 # for approx. radius in Celestia EllipticalOrbit { Period 11.41 SemiMajorAxis 1.26 # mass ratio 75.0J:70.1J Eccentricity 0.47 Inclination 77.95 AscendingNode 138.03 ArgOfPericenter 87.11 MeanAnomaly 49.82 } } "EPS Ind Bb:CI Ind B:Gliese 845 Bb" { OrbitBarycenter "EPS Ind B" SpectralType "T6V" Temperature 850 Radius 60000 # approx. AbsMag 40 # extremely low EllipticalOrbit { Period 11.41 SemiMajorAxis 1.35 # mass ratio 75.0J:70.1J Eccentricity 0.47 Inclination 77.95 AscendingNode 138.03 ArgOfPericenter 267.11 MeanAnomaly 49.82 } } 8102 # Tau Cet { RA 26.01701426 Dec -15.93747960 Distance 11.905 # 273.96 +/- 0.17 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 SpectralType "M5.5V" AppMag 13.03 } 5643 # YZ Cet { RA 18.12765323 Dec -16.99898925 Distance 12.1084 # 269.3628 +/- 0.0785 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 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 SpectralType "M7.0V" AppMag 15.40 } 24186 # Kapteyn's Star { RA 77.91912216 Dec -45.01843165 Distance 12.8294 # 254.2263 +/- 0.0263 mas SpectralType "M1VI" AppMag 8.853 } 105090 # Lacaille 8760 { RA 319.31362024 Dec -38.86736390 Distance 12.9515 # 251.8295 +/- 0.0559 mas SpectralType "M1V" AppMag 6.68 } # used Gaia DR2 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 } "SCR 1845-6357 A" { OrbitBarycenter "SCR 1845-6357" SpectralType "M8.5V" AppMag 17.40 EllipticalOrbit { Period 24 # estimate SemiMajorAxis 1.6 # estimated mass ratio 0.07:0.045 ArgOfPericenter 180 } } "SCR 1845-6357 B" { OrbitBarycenter "SCR 1845-6357" SpectralType "T6V" AbsMag 33.5 # for approximate radius in Celestia EllipticalOrbit { Period 24 # estimate SemiMajorAxis 2.4 # estimated mass ratio 0.07:0.045 } } 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 Distance 13.0780 # 249.3926 +/- 0.1653 mas } 1000923991 "Gliese 860 A:Kruger 60 A:ADS 15972 A" { OrbitBarycenter "Kruger 60" SpectralType "M3V" AppMag 9.93 EllipticalOrbit { Period 44.581 SemiMajorAxis 3.48 # mass ratio 0.30:0.17 Eccentricity 0.408 Inclination 37.20 AscendingNode 129.48 ArgOfPericenter 262.00 MeanAnomaly 240.36 } } 2000923991 "DO Cep:Gliese 860 B:Kruger 60 B:ADS 15972 B" { OrbitBarycenter "Kruger 60" SpectralType "M4V" AppMag 11.41 EllipticalOrbit { Period 44.67 SemiMajorAxis 6.15 # mass ratio 0.30:0.17 Eccentricity 0.408 Inclination 37.20 AscendingNode 129.48 ArgOfPericenter 82.00 MeanAnomaly 240.36 } } "DENIS 1048-3956:DENIS J104814.6-395606:RECONS 2" { RA 162.06072261 Dec -39.93523423 Distance 13.1932 # 247.2157 +/- 0.1236 mas SpectralType "M9V" AppMag 17.532 } # 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 } "V577 Mon:Gliese 234 A:Ross 614 A" { OrbitBarycenter "Ross 614" SpectralType "M4.5V" AppMag 11.15 EllipticalOrbit { # fully specified orientation Period 16.63 SemiMajorAxis 1.48 # mass ratio 0.223:0.109 Eccentricity 0.38 Inclination 93.87 AscendingNode 322.71 ArgOfPericenter 167.29 MeanAnomaly 15.85 } } "Gliese 234 B:Ross 614 B" { OrbitBarycenter "Ross 614" SpectralType "M7V" AppMag 14.23 EllipticalOrbit { # fully specified orientation Period 16.63 SemiMajorAxis 3.02 # mass ratio 0.223:0.109 Eccentricity 0.38 Inclination 93.87 AscendingNode 322.71 ArgOfPericenter 347.29 MeanAnomaly 15.85 } } # 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 Distance 13.850 # 235.5 +/- 2.9 mas } "Gliese 473 A:Wolf 424 A" { OrbitBarycenter "Wolf 424" SpectralType "M5.5V" AppMag 13.18 EllipticalOrbit { Period 15.81 SemiMajorAxis 1.86 # mass ratio 0.124:0.113 Eccentricity 0.30 Inclination 29.15 AscendingNode 357.44 ArgOfPericenter 80.72 MeanAnomaly 172.43 } } "FL Vir:Gliese 473 B:Wolf 424 B" { OrbitBarycenter "Wolf 424" SpectralType "M5.5V" AppMag 13.17 EllipticalOrbit { Period 15.81 SemiMajorAxis 2.04 # mass ratio 0.124:0.113 Eccentricity 0.30 Inclination 29.15 AscendingNode 357.44 ArgOfPericenter 260.72 MeanAnomaly 172.43 } } 80824 # Wolf 1061 { RA 247.57524250 Dec -12.66258979 Distance 14.0458 # 232.2095 +/- 0.0630 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 SpectralType "DZ7.5" AppMag 12.374 } 439 # Gliese 1 { RA 1.35178251 Dec -37.35736228 Distance 14.1725 # 230.1331 +/- 0.0600 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 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 SpectralType "M3.0V" AppMag 9.15 } "GJ 3622:LP 731-58" { RA 162.05255937 Dec -11.33600262 Distance 14.8851 # 219.1159 +/- 0.1567 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 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 } # 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 { RA 298.477317 # mass ratio (0.111:0.076):0.10 Dec 44.415377 Distance 15.268 } Barycenter "GJ 1245 A" { RA 298.47700882 Dec 44.41426155 Distance 15.3029 # 213.1329 +/- 0.5737 mas } "V1581 Cyg:GJ 1245 Aa" { OrbitBarycenter "GJ 1245 A" SpectralType "M5.5V" AppMag 13.46 EllipticalOrbit { Period 16.84 SemiMajorAxis 1.53 # mass ratio 0.111:0.076 Eccentricity 0.33 Inclination 70.45 AscendingNode 37.06 ArgOfPericenter 208.50 MeanAnomaly 2.21 } } "GJ 1245 Ab" { OrbitBarycenter "GJ 1245 A" SpectralType "M7.5V" AppMag 16.75 EllipticalOrbit { Period 16.84 SemiMajorAxis 2.23 # mass ratio 0.111:0.076 Eccentricity 0.33 Inclination 70.45 AscendingNode 37.06 ArgOfPericenter 28.50 MeanAnomaly 2.21 } } "GJ 1245 B" { RA 298.47974513 Dec 44.41504008 Distance 15.2034 # 214.5285 +/- 0.0824 mas SpectralType "M6V" AppMag 13.99 } "GJ 3618:Luyten 143-23" { RA 161.08847255 Dec -61.20979537 Distance 15.7703 # 206.8172 +/- 0.0735 mas SpectralType "M5.0V" AppMag 13.920 } "GJ 1002" { RA 1.67998846 Dec -7.53806229 Distance 15.8164 # 206.2134 +/- 0.1281 mas SpectralType "M5.5V" Radius 122000 # approx. for class AppMag 13.837 } # 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 } "Gliese 412 A:Lalande 21258 A" { RA 166.36907492 Dec 43.52677540 Distance 15.812 # 206.27 +/- 1.00 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 SpectralType "M6.0V" AppMag 14.45 } 49908 # Groombridge 1618 { 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 } 106440 # Gliese 832 { RA 323.39156247 Dec -49.00900096 Distance 16.1939 # 201.4073 +/- 0.0429 mas SpectralType "M2V" Radius 306000 # approx. for class AppMag 8.672 } 1001741423 "AD Leo:Gliese 388" { RA 154.90117001 Dec 19.87000390 Distance 16.1970 # 201.3683 +/- 0.0679 mas SpectralType "M4Vae" Radius 180000 # approx. for class AppMag 9.52 } # mass of component A from Ma et al. (2018), MNRAS 480 (2), 2411 # "The first super-Earth detection from the high cadence and high radial velocity # precision Dharma Planet Survey" # 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 } "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 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 } # radius from Bond et al. (2017), ApJ 848 (1), 16 # "Astrophysical Implications of a New Dynamical Mass for the # Nearby White Dwarf 40 Eridani B" # http://iopscience.iop.org/article/10.3847/1538-4357/aa8a63/meta "Keid B:OMI2 Eri B:40 Eri B:Gliese 166 B:ADS 3093 B" { OrbitBarycenter "Keid BC" SpectralType "DA3" Radius 9100 AppMag 9.53 EllipticalOrbit { Period 222.74 SemiMajorAxis 8.855 # mass ratio 0.573:0.2036 Eccentricity 0.451 Inclination 83.57 AscendingNode 216.91 ArgOfPericenter 77.11 MeanAnomaly 245.29 } } "Keid C:OMI2 Eri C:40 Eri C:DY Eri:Gliese 166 C:ADS 3093 C" { OrbitBarycenter "Keid BC" SpectralType "M4.5V" Radius 180000 # approx. for class AppMag 11.17 EllipticalOrbit { Period 222.74 SemiMajorAxis 24.92 # mass ratio 0.573:0.2036 Eccentricity 0.451 Inclination 83.57 AscendingNode 216.91 ArgOfPericenter 257.11 MeanAnomaly 245.29 } } 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 SpectralType "M4.0V" Radius 225000 # approx. for class AppMag 10.26 } # Eggenberger et al. (2008), A&A 482 (2), 631 # "Analysis of 70 Ophiuchi AB including seismic constraints" # 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 } 1052130434 "70 Oph A:Gliese 702 A:Struve 2272 A:ADS 11046 A" { OrbitBarycenter "70 Oph" SpectralType "K0V" AppMag 4.13 EllipticalOrbit { # fully specified orientation Period 88.44 SemiMajorAxis 10.37 # mass ratio 0.89:0.73 Eccentricity 0.50 Inclination 28.75 AscendingNode 73.59 ArgOfPericenter 285.57 MeanAnomaly 63.92 } } 1052120434 "70 Oph B:Gliese 702 B:Struve 2272 B:ADS 11046 B" { OrbitBarycenter "70 Oph" SpectralType "K4V" AppMag 6.07 EllipticalOrbit { # fully specified orientation Period 88.44 SemiMajorAxis 12.64 # mass ratio 0.89:0.73 Eccentricity 0.50 Inclination 28.75 AscendingNode 73.59 ArgOfPericenter 105.57 MeanAnomaly 63.92 } } # rotational parameters from Bouchaud et al. (2020), A&A 633, A78 # "A realistic two-dimensional model of Altair" # https://arxiv.org/abs/1912.03138 97649 # Altair { RA 297.69582730 Dec 8.86832120 Distance 16.730 # 194.95 +/- 0.57 SpectralType "A7IV" AppMag 0.76 Radius 1396700 # equatorial radius SemiAxes [ 1 0.779 1 ] # equatorial radius 28.3% greater than polar UniformRotation { Period 7.79 # from equatorial rotational velocity Inclination 81.21 # inclination (i) = 50.65 deg AscendingNode 246.44 # orientation (alpha) = 301.13 deg } } # 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 } "EI Cnc:GJ 1116 A" { OrbitBarycenter "GJ 1116" SpectralType "M8Ve" AppMag 13.93 EllipticalOrbit { Period 134.4 SemiMajorAxis 7.902 # mass ratio 0.11:0.10 Eccentricity 0.661 Inclination 84.9 AscendingNode 59.9 ArgOfPericenter 22.9 MeanAnomaly 343.3 } } "GJ 1116 B:LP 426-40" { OrbitBarycenter "GJ 1116" SpectralType "M7V" AppMag 13.75 EllipticalOrbit { Period 134.4 SemiMajorAxis 8.692 # mass ratio 0.11:0.10 Eccentricity 0.661 Inclination 84.9 AscendingNode 59.9 ArgOfPericenter 202.9 MeanAnomaly 343.3 } } # rotation period from Burningham et al. (2016), MNRAS 463 (2), 2202 # "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 1506+7027:WISE J150649.97+702736.1" { RA 226.71850107 Dec 70.45697728 Distance 16.8516 # 193.5457 +/- 0.9420 mas AppMag 17.48 # calculated from J, H, and Ks bands SpectralType "T6" Radius 60000 # approx. RotationPeriod 1.74 Temperature 1000 } 1006050134 "GJ 3379:Giclas 99-49" { RA 90.01459942 Dec 2.70655466 Distance 16.9813 # 192.0675 +/- 0.0715 mas SpectralType "M3.5Ve" Radius 225000 # approx. for class AppMag 11.31 } "WISE J0817-6155:WISEP J081729.74-615504.1" { RA 124.37499532 Dec -61.92101733 Distance 17.0290 # 191.5301 +/- 0.6037 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 SpectralType "M4.0Ve" Radius 181000 # approx. for class AppMag 10.84 } # magnitude from Perez Garrido et al. (2014), A&A 567, A6 # "2MASS J154043.42-510135.7: a new addition to the 5 pc population" # 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 SpectralType "M6.5" Radius 83500 # approx. for class AppMag 15.26 # measured w/ ESO Faint Object Spectrograph and Camera } # Leggett et al. (2009), ApJ 695, 1517 # "The phyical properties of four 600K T dwarfs." # http://iopscience.iop.org/article/10.1088/0004-637X/695/2/1517/meta # unresolved binary; separation and orbit unknown "2MASS 0939-2448 A:2MASS J09393548-2448279 A" { RA 144.897865 Dec -24.807761 Distance 17.414 # 187.30 +/- 4.60 mas SpectralType "T8V" Temperature 600 Radius 60000 # approx. AbsMag 40 # extremely low } "2MASS 0939-2448 B:2MASS J09393548-2448279 B" { RA 144.897885 Dec -24.807761 Distance 17.414 # 187.30 +/- 4.60 mas SpectralType "T8V" Temperature 600 Radius 60000 # approx. AbsMag 40 # extremely low } "GJ 3323:LP 656-38:RECONS 3" { RA 75.48927544 Dec -6.94621441 Distance 17.5331 # 186.0231 +/- 0.0590 SpectralType "M4.0Ve" Radius 180000 # approx. for class AppMag 12.196 } 67155 # Lalande 25372 { RA 206.43239772 Dec 14.89152033 Distance 17.7274 # 183.9836 +/- 0.0509 SpectralType "M2V" Radius 306000 # approx. for class AppMag 8.50 } # mass ratio 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 } 1004123744 "Gliese 169.1 A:Stein 2051 A" { RA 67.79795272 Dec 58.97706349 Distance 18.0774 # 180.4215 +/- 0.5863 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 10.977 } 1020623744 "Gliese 169.1 B:Stein 2051 B" { RA 67.80237894 Dec 58.97813685 Distance 17.9917 # 181.2815 +/- 0.0450 mas SpectralType "DC5" AppMag 11.19 } 33226 # Wolf 294 { RA 103.70399048 Dec 33.26817738 Distance 18.2043 # 179.1642 +/- 0.0632 mas SpectralType "M3V" Radius 270000 # approx. for class AppMag 10.11 } 103039 # LP 816-60 { RA 313.13756964 Dec -16.97472438 Distance 18.3106 # from 178.1243 +/- 0.0849 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" { 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 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 SpectralType "M8.5V" Radius 66000 # approx. for class AppMag 18.27 } 25878 # Wolf 1453 { RA 82.86414936 Dec -3.67722821 Distance 18.5919 # from 175.4287 +/- 0.0672 mas SpectralType "M1.5Ve" Radius 324000 # approx. for class AppMag 7.968 } # 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 "2MASS 0415-0935:2MASS J04151954-0935066" { RA 63.8381022 Dec -9.5835266 Distance 18.62 # 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 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 } "Gliese 229 A:Luyten 668-21 A:LPM 230 A" { OrbitBarycenter "Gliese 229" SpectralType "M1V" AppMag 8.125 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 } } "Gliese 229 B:Luyten 668-21 B:LPM 230 B" { OrbitBarycenter "Gliese 229" SpectralType "T6.5V" 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 } } 26857 # Ross 47 { RA 85.53861374 Dec 12.48933659 Distance 18.8850 # 172.7068 +/- 0.0788 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 11.509 } # 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 } 73184 "KX Lib:Gliese 570 A:ADS 9446 A" { OrbitBarycenter "Gliese 570" SpectralType "K4V" AppMag 5.64 Radius 514100 EllipticalOrbit { # fully specified orientation Period 2130 SemiMajorAxis 104.4 # mass ratio 0.802:(0.586:0.390) Eccentricity 0.20 Inclination 142.6 AscendingNode 191.6 ArgOfPericenter 129.2 MeanAnomaly 52.6 } } Barycenter 73182 "Gliese 570 BC" { OrbitBarycenter "Gliese 570" EllipticalOrbit { # fully specified orientation Period 2130 SemiMajorAxis 85.8 # mass ratio 0.802:(0.586:0.390) Eccentricity 0.20 Inclination 142.6 AscendingNode 191.6 ArgOfPericenter 309.2 MeanAnomaly 52.6 } } "Gliese 570 B:ADS 9446 B" { OrbitBarycenter "Gliese 570 BC" SpectralType "M1.5V" Radius 324000 # approx. for class AppMag 8.33 EllipticalOrbit { # fully specified orientation Period 0.846 SemiMajorAxis 0.35 # mass ratio 0.586:0.390 Eccentricity 0.76 Inclination 90.68 AscendingNode 30.52 ArgOfPericenter 221.92 MeanAnomaly 45.19 } } "Gliese 570 C:ADS 9446 C" { OrbitBarycenter "Gliese 570 BC" SpectralType "M3V" Radius 270000 # approx. for class AppMag 9.94 EllipticalOrbit { # fully specified orientation Period 0.846 SemiMajorAxis 0.53 # mass ratio 0.586:0.390 Eccentricity 0.76 Inclination 90.68 AscendingNode 30.52 ArgOfPericenter 41.92 MeanAnomaly 45.19 } } # 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 "Gliese 570 D:ADS 9446 D" { RA 224.31233 Dec -21.36328 Distance 19.184 SpectralType "T8V" Temperature 710 Radius 80000 AbsMag 40 # extremely low } 86990 # Luyten 205-128 { RA 266.64263979 Dec -57.31904446 Distance 19.2013 # 169.8613 +/- 0.1184 mas SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 10.783 } 117473 # Gliese 908 { RA 357.30218808 Dec 2.40122307 Distance 19.2583 # 169.3585 +/- 0.0595 mas SpectralType "M1V" Radius 341000 # approx. for class AppMag 8.993 } # Parameters of A from Karminski et al. (2018), A&A 618, A115 # "The CARMENES search for exoplanets around M dwarfs. A Neptune-mass # planet traversing the habitable zone around HD 180617" # https://arxiv.org/abs/1808.01183 # Parameters of B from Tsuji et al. (2016), PASJ 68 (1), 1331 # "Near-infrared spectroscopy of M dwarfs. III. Carbon and oxygen abundances # in late M dwarfs, including the dusty rapid rotator 2MASSI J1835379+325954" # 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 } "V1428 Aql:Gliese 752 A:Ross 652 A:Wolf 1055 A:HD 180617 A" { RA 289.23023552 Dec 5.16889968 Distance 19.2810 SpectralType "M2.5V" Radius 315000 AppMag 9.115 RotationPeriod 1105 } "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 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 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 } # Mass ratio from theoretical values from same source as orbit "Achird A:ETA Cas A:24 Cas A:Gliese 34 A:ADS 671 A" { OrbitBarycenter "ETA Cas" SpectralType "G0V" AppMag 3.44 EllipticalOrbit { Period 479.27 SemiMajorAxis 24.22 # mass ratio 1.07:0.55 Eccentricity 0.50 Inclination 152.40 AscendingNode 8.78 ArgOfPericenter 182.11 MeanAnomaly 82.68 } } 2026693663 "Achird B:ETA Cas B:24 Cas B:Gliese 34 B:ADS 671 B" { OrbitBarycenter "ETA Cas" SpectralType "K7V" AppMag 7.51 EllipticalOrbit { Period 479.27 SemiMajorAxis 47.12 # mass ratio 1.07:0.55 Eccentricity 0.50 Inclination 152.40 AscendingNode 8.78 ArgOfPericenter 2.11 MeanAnomaly 82.68 } } 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 } # 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 } # Average masses from Luck, R. E. (2017), AJ 153 (1), 21 # "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants" # http://iopscience.iop.org/article/10.3847/1538-3881/153/1/21/meta 1003266820 "Guniibuu A:36 Oph A:Gliese 663 A:ADS 10417 A" { OrbitBarycenter "36 Oph AB" SpectralType "K2V" AppMag 5.08 EllipticalOrbit { Period 470.9 SemiMajorAxis 38.99 # mass ratio 0.75:0.76 Eccentricity 0.92 Inclination 13.35 AscendingNode 348.86 ArgOfPericenter 270.97 MeanAnomaly 246.27 } } 2003266820 "Guniibuu B:36 Oph B:Gliese 663 B:ADS 10417 B" { OrbitBarycenter "36 Oph AB" SpectralType "K1V" AppMag 5.08 EllipticalOrbit { Period 470.9 SemiMajorAxis 38.48 # mass ratio 0.75:0.76 Eccentricity 0.92 Inclination 13.35 AscendingNode 348.86 ArgOfPericenter 90.97 MeanAnomaly 246.27 } } 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 SpectralType "K5V" AppMag 6.34 } # 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 1541-2250:WISE J1541-2250:WISEPA J154151.66-225025.2" { RA 235.464061 Dec -22.840554 Distance 19.524 # 167.05 +/- 4.19 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 Distance 19.577 # 166.6 +/- 0.3 mas } "GJ 1005 A:Luyten 722-22 A" { OrbitBarycenter "GJ 1005" SpectralType "M3.5V" AppMag 11.60 EllipticalOrbit { Period 4.565 SemiMajorAxis 0.70 # mass ratio 0.179:0.112 Eccentricity 0.36 Inclination 72.44 AscendingNode 85.33 ArgOfPericenter 182.79 MeanAnomaly 5.81 } } "GJ 1005 B:Luyten 722-22 B" { OrbitBarycenter "GJ 1005" SpectralType "M7V" AppMag 14.02 EllipticalOrbit { Period 4.565 SemiMajorAxis 1.12 # mass ratio 0.179:0.112 Eccentricity 0.36 Inclination 72.44 AscendingNode 85.33 ArgOfPericenter 2.79 MeanAnomaly 5.81 } } 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 } "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 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 SpectralType "M3.5V" Radius 180000 # approx. for class AppMag 11.50 } 15510 # 82 Eri { RA 49.98187890 Dec -43.06978264 Distance 19.711 # 165.47 +/- 0.19 mas SpectralType "G6V" AppMag 4.27 } # Barry et al. (2012), ApJ 760 (1), 55 # "A Precise Physical Orbit for the M-dwarf Binary Gliese 268" # 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 } "QY Aur:Gliese 268 A:Ross 986 A" { OrbitBarycenter "Gliese 268" SpectralType "M4.5V" AppMag 12.05 EllipticalOrbit { # fully specified orbit Period 0.028547 SemiMajorAxis 0.03110 # mass ratio 0.22599:0.19248 Eccentricity 0.3203 Inclination 8.92 AscendingNode 66.51 ArgOfPericenter 161.27 MeanAnomaly 272.77 } } "Gliese 268 B:Ross 986 B" { OrbitBarycenter "Gliese 268" SpectralType "M6V" AppMag 12.45 EllipticalOrbit { # fully specified orbit Period 0.028547 SemiMajorAxis 0.03641 # mass ratio 0.22599:0.19248 Eccentricity 0.3203 Inclination 8.92 AscendingNode 66.51 ArgOfPericenter 341.27 MeanAnomaly 272.77 } } 99240 # Del Pav { RA 302.18170612 Dec -66.18206758 Distance 19.923 # 163.71 +/- 0.17 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 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 "2MASS 0937+2931:2MASS J09373487+2931409" { RA 144.395333 Dec 29.528056 Distance 19.961 # 163.39 +/- 1.76 mas SpectralType "T6.0V" AbsMag 33.5 # for approximate radius in Celestia } 99701 # Gliese 784 { RA 303.47248496 Dec -45.16402041 Distance 20.0932 # 162.3212 +/- 0.0495 mas SpectralType "M0V" Radius 432000 # approx. for class AppMag 7.966 } "GJ 1221:LP 44-113" { RA 267.03330405 Dec 70.87664478 Distance 20.2604 # 160.9819 +/- 0.0143 mas SpectralType "DQ9P" AppMag 14.15 } 71253 # Gliese 555 { RA 218.57004817 Dec -12.51956038 Distance 20.3702 # 160.1141 +/- 0.1135 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 } Barycenter "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) Eccentricity 0.2 Inclination 19.6 AscendingNode 138.8 ArgOfPericenter 119.1 MeanAnomaly 352.0 } } Barycenter "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) Eccentricity 0.2 Inclination 19.6 AscendingNode 138.8 ArgOfPericenter 299.1 MeanAnomaly 352.0 } } "EQ Peg:Gliese 896 Aa:BD+19 5116 Aa" { OrbitBarycenter "Gliese 896 A" SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 10.27 EllipticalOrbit { Period 3.5 # "of the order of a few years" SemiMajorAxis 0.5 # mass ratio 0.34:0.13 Inclination 20 # to match orbital plane of system AscendingNode 140 ArgOfPericenter 180 } } "Gliese 896 Ab:BD+19 5116 Ab" { OrbitBarycenter "Gliese 896 A" SpectralType "M7V" # from apparent magnitude Radius 84000 # approx. for estimated class AppMag 13.26 EllipticalOrbit { Period 3.5 # "of the order of a few years" SemiMajorAxis 1.2 # mass ratio 0.34:0.13 Inclination 20 # to match orbital plane of system AscendingNode 140 } } "Gliese 896 Ba:BD+19 5116 Ba" { OrbitBarycenter "Gliese 896 B" SpectralType "M4.5V" Radius 160000 # approx. for class AppMag 12.21 EllipticalOrbit { Period 4.1 # "of the order of a few years" SemiMajorAxis 0.6 # mass ratio 0.16:0.09 Inclination 20 # to match orbital plane of system AscendingNode 140 ArgOfPericenter 180 } } "Gliese 896 Bb:BD+19 5116 Bb" { OrbitBarycenter "Gliese 896 B" SpectralType "M9V" # from apparent magnitude Radius 56000 # approx. for class AppMag 15.40 EllipticalOrbit { Period 4.1 # "of the order of a few years" SemiMajorAxis 1.0 # mass ratio 0.16:0.09 Inclination 20 # to match orbital plane of system AscendingNode 140 } } 74995 # Gliese 581 { RA 229.86177972 Dec -7.72227527 Distance 20.5454 # 158.7492 +/- 0.0523 mas SpectralType "M3V" Radius 270000 # approx. for class AppMag 10.560 } # 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 } 45343 "Gliese 338 A:Struve 1321 A:ADS 7251 A" { OrbitBarycenter "Gliese 338" SpectralType "M0.0V" Radius 403500 AppMag 7.63 EllipticalOrbit { Period 1295 SemiMajorAxis 63.0 # mass ratio 0.69:0.64 Eccentricity 0.01 Inclination 123.3 AscendingNode 348.8 ArgOfPericenter 184.3 MeanAnomaly 135.4 } RotationPeriod 391.2 # 16.3 d } 120005 "Gliese 338 B:Struve 1321 B:ADS 7251 B" { OrbitBarycenter "Gliese 338" SpectralType "M0.0V" Radius 403500 AppMag 7.70 EllipticalOrbit { Period 1295 SemiMajorAxis 67.9 # mass ratio 0.69:0.64 Eccentricity 0.01 Inclination 123.3 AscendingNode 348.8 ArgOfPericenter 4.3 MeanAnomaly 135.4 } RotationPeriod 398.64 # 16.61 d } "LHS 2090:LP 368-128" { RA 135.09811222 Dec 21.83469395 Distance 20.8063 # 156.7584 +/- 0.1329 mas SpectralType "M6.5V" Radius 105000 # approx. for class AppMag 16.100 } Barycenter 84140 "Gliese 661:BD+45 2505" { RA 258.03296559 Dec 45.66589325 Distance 20.865 } "Gliese 661 A:BD+45 2505 A" { OrbitBarycenter "Gliese 661" SpectralType "M3V" 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 } } "Gliese 661 B:BD+45 2505 B" { OrbitBarycenter "Gliese 661" SpectralType "M4V" 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 } } "LP 944-20" { RA 54.89688549 Dec -35.42878568 Distance 20.9398 # 155.7590 +/- 0.0991 mas SpectralType "M9.5Ve" Radius 56000 # approx. for class AppMag 18.69 } "Gliese 223.2:LP 658-2:HL 4" { RA 88.78971006 Dec -4.16862949 Distance 21.0084 # 155.2501 +/- 0.0287 mas SpectralType "DZ9" # DZ11 AppMag 14.45 } "2MASS 1503+2525:2MASS J15031961+2525196" { RA 225.83171067 Dec 25.42215925 Distance 21.0531 # 154.9208 +/- 1.1025 mas SpectralType "T5.5V" AbsMag 32 # for approximate radius in Celestia } 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 } # Parallax and 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 } "V1054 Oph:Gliese 644 A:Wolf 630 A" { OrbitBarycenter "Gliese 644 AB" SpectralType "M2.5V" AppMag 9.73 EllipticalOrbit { # fully specified orientation Period 1.718 SemiMajorAxis 0.90 # mass ratio 0.4155:(0.3466:0.3143) Eccentricity 0.04 Inclination 82.15 AscendingNode 324.51 ArgOfPericenter 236.42 MeanAnomaly 63.52 } } Barycenter "Gliese 644 B:Wolf 630 B" { OrbitBarycenter "Gliese 644 AB" EllipticalOrbit { # fully specified orientation Period 1.718 SemiMajorAxis 0.57 # mass ratio 0.4155:(0.3466:0.3143) Eccentricity 0.04 Inclination 82.15 AscendingNode 324.51 ArgOfPericenter 56.42 MeanAnomaly 63.52 } } "Gliese 644 Ba:Wolf 630 Ba" { OrbitBarycenter "Gliese 644 B" SpectralType "M3V" AppMag 10.54 EllipticalOrbit { Period 0.008125 # 2.965509 d SemiMajorAxis 0.0167 # mass ratio 0.3466:0.3143 Eccentricity 0.02 # axis calculated from mass and period Inclination 80.81 AscendingNode 328.19 # assumed to be identical to A-B ArgOfPericenter 79.87 MeanAnomaly 164.82 } } "Gliese 644 Bb:Wolf 630 Bb" { OrbitBarycenter "Gliese 644 B" SpectralType "M4V" AppMag 10.63 EllipticalOrbit { Period 0.008125 # 2.965509 d SemiMajorAxis 0.0185 # mass ratio 0.3466:0.3143 Eccentricity 0.02 # axis calculated from mass and period Inclination 80.81 AscendingNode 328.19 # assumed to be identical to A-B ArgOfPericenter 259.87 MeanAnomaly 164.82 } } # Physical parameters 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 "Gliese 644 C:Wolf 630 C:VB 8" { RA 253.89690059 Dec -8.39465358 Distance 21.2046 # 153.8139 +/- 0.1148 mas 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 SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 11.759 } "GJ 1128:LHS 271:Luyten 100-115" { RA 145.69309184 Dec -68.88500107 Distance 21.2090 # 153.7816 +/- 0.0554 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 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" { RA 048.358100 Dec 78.128986 Distance 21.3 # 153 +/- 15 mas SpectralType "T8.5V" Temperature 651 Radius 61500 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 SpectralType "M4.0V" Radius 180000 # approx. for class AppMag 12.74 } # 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 } 1007221481 "XI Boo A:37 Boo A:Gliese 566 A:ADS 9413 A" { OrbitBarycenter "XI Boo" SpectralType "G7Ve" AppMag 4.675 EllipticalOrbit { Period 151.6 SemiMajorAxis 13.80 # mass ratio 0.94:0.67 Eccentricity 0.51 Inclination 83.21 AscendingNode 270.13 ArgOfPericenter 158.75 MeanAnomaly 215.38 } } 2007221481 "XI Boo B:37 Boo B:Gliese 566 B:ADS 9413 B" { OrbitBarycenter "XI Boo" SpectralType "K5Ve" AppMag 6.816 EllipticalOrbit { Period 151.6 SemiMajorAxis 19.36 # mass ratio 0.94:0.67 Eccentricity 0.51 Inclination 83.21 AscendingNode 270.13 ArgOfPericenter 338.75 MeanAnomaly 215.38 } } 53767 # Ross 104 { RA 165.01773737 Dec 22.83295740 Distance 22.0185 # 148.1283 +/- 0.0569 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 10.020 } # Tokovinin et al. (2015), AJ 150 (2), 50 # "Speckle Interferometry at SOAR in 2014" # http://iopscience.iop.org/article/10.1088/0004-6256/150/2/50/meta # 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 "GJ 3522:Giclas 41-14" { RA 134.734670 Dec 8.4739078 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 SemiMajorAxis 0.86 # mass ratio (0.19:0.17):0.17 Eccentricity 0.78 Inclination 155.71 AscendingNode 234.28 ArgOfPericenter 34.91 MeanAnomaly 303.15 } } "GJ 3522 Aa:Giclas 41-14 Aa" { OrbitBarycenter "Giclas 41-14 A" SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 11.94 EllipticalOrbit { Period 0.021 # 7.6 d SemiMajorAxis 0.0255 # estimated from mass ratio 0.19:0.17 Inclination 156 # guess - to match AscendingNode 234 # plane of AB } } "GJ 3522 Ab:Giclas 41-14 Ab" { OrbitBarycenter "Giclas 41-14 A" SpectralType "M6V" # from estimated mass Radius 105000 # approx. for estimated class AppMag 12.14 EllipticalOrbit { Period 0.021 # 7.6 d SemiMajorAxis 0.0285 # estimated from mass ratio 0.19:0.17 Inclination 156 # guess - to match AscendingNode 234 # plane of AB ArgOfPericenter 180 } } "GJ 3522 B:Giclas 41-14 B" { OrbitBarycenter "Giclas 41-14" SpectralType "M6V" Radius 105000 # approx. for estimated class AppMag 12.28 EllipticalOrbit { Period 5.566 SemiMajorAxis 1.83 # mass ratio (0.19:0.17):0.17 Eccentricity 0.78 Inclination 155.71 AscendingNode 234.28 ArgOfPericenter 214.91 MeanAnomaly 303.15 } } # 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 106106 "Gliese 829:Ross 775" { RA 322.40338336 Dec 17.64329431 Distance 22.0954 # 147.6126 +/- 0.0979 mas } "Gliese 829 A:Ross 775 A" { OrbitBarycenter "Ross 775" SpectralType "M3.0V" Radius 270000 # approx. for class AppMag 11.05 EllipticalOrbit { Period 0.146 # 53.2 d SemiMajorAxis 0.11 # estimated from mass ratio 0.26:0.26 ArgOfPericenter 180 } } "Gliese 829 B:Ross 775 B" { OrbitBarycenter "Ross 775" SpectralType "M3.5V" Radius 225000 # approx. for class AppMag 11.05 EllipticalOrbit { Period 0.146 # 53.2 d SemiMajorAxis 0.11 # estimated from mass ratio 0.26:0.26 } } # Dupuy et al. (2019), AJ 158 (5), 174 # "WISE J072003.20-084651.2B is a Massive T Dwarf" # 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 } # 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" { OrbitBarycenter "WISE 0720-0846" SpectralType "M9.5V" AppMag 18.266 EllipticalOrbit { # fully specified orbit Period 8.06 SemiMajorAxis 0.87 # mass ratio 99J:66J Eccentricity 0.24 Inclination 59.8 AscendingNode 158.8 ArgOfPericenter 39.7 MeanAnomaly 18.4 } } "Scholz's Star B:WISE J0720-0846 B:WISE J072003.20-084651.2 B" { OrbitBarycenter "WISE 0720-0846" SpectralType "T5.5V" AbsMag 32 # for approximate radius in Celestia EllipticalOrbit { # fully specified orbit Period 8.06 SemiMajorAxis 1.31 # mass ratio 99J:66J Eccentricity 0.24 Inclination 59.8 AscendingNode 158.8 ArgOfPericenter 219.7 MeanAnomaly 18.4 } } 113296 # Ross 671 { 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 } # Used parallax of component B, from Gaia DR2 # 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 } 1006945865 "LTT 1445 A:GJ 3193:LP 771-96:Luyten 730-18:RECONS 4" { RA 45.46412500 Dec -16.5933611 Distance 22.4090 AppMag 11.22 SpectralType "M3V" Radius 186400 } Barycenter "LTT 1445 BC:GJ 3192:LP 771-95" { RA 45.462666667 Dec -16.59197222 Distance 22.4090 } "LTT 1445 B:GJ 3192 A:LP 771-95 A" { OrbitBarycenter "LTT 1445 BC" SpectralType "M4V" # estimate from mass and radius AppMag 11.78 Radius 164200 EllipticalOrbit { Period 36.2 SemiMajorAxis 3.4096 # mass ratio 0.215:0.161 Eccentricity 0.50 Inclination 70.41 AscendingNode 204.85 ArgOfPericenter 333.35 MeanAnomaly 169.06 } } "LTT 1445 C:GJ 3192 B:LP 771-95 B" { OrbitBarycenter "LTT 1445 BC" SpectralType "M4V" # estimate from mass and radius AppMag 12.64 Radius 137100 EllipticalOrbit { Period 36.2 SemiMajorAxis 4.5532 # mass ratio 0.215:0.161 Eccentricity 0.50 Inclination 70.41 AscendingNode 204.85 ArgOfPericenter 153.35 MeanAnomaly 169.06 } } "Gliese 299:Ross 619" { 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 } # parameters from Martin et al. (2018) "WISE 1405+5534:WISE J140518.39+553421.3" { RA 211.322480 Dec 55.572793 Distance 22.59 # 144.35 +/- 8.60 mas SpectralType "Y0V" Temperature 400 # guess Radius 60000 # approx. AbsMag 40 # extremely low } 53020 # Wolf 358 { RA 162.71679684 Dec 6.80812877 Distance 22.7291 # 143.4971 +/- 0.0626 mas SpectralType "M4V" Radius 180000 # approx. for class AppMag 11.675 } 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 } "GJ 3877:LP 914-54" { RA 224.15943498 Dec -28.16350623 Distance 23.0196 # 141.6865 +/- 0.1063 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) # 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 SpectralType "Y0V" Temperature 407 Radius 65000 AbsMag 40 # extremely low } "GJ 4274:Luyten 788-34" { RA 335.77915456 Dec -17.60731501 Distance 23.6040 # 138.1782 +/- 0.2484 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 { RA 259.7396833 # mass ratio (0.68:0.59):0.35 Dec -34.99129014 Distance 23.6316 } Barycenter 84709 "Gliese 667 AB:CD-34 11626 AB" { RA 259.7381868 Dec -34.9897615 Distance 23.6316 # 138.0171 +/- 0.0918 mas } 1008507370 "Gliese 667 A:CD-34 11626 A" { OrbitBarycenter "Gliese 667 AB" SpectralType "K4V" AppMag 5.90 EllipticalOrbit { Period 42.15 SemiMajorAxis 5.98 # mass ratio 0.68:0.59 Eccentricity 0.58 Inclination 136.65 AscendingNode 305.37 ArgOfPericenter 183.60 MeanAnomaly 205.84 } } 2008507370 "Gliese 667 B:CD-34 11626 B" { OrbitBarycenter "Gliese 667 AB" SpectralType "K5V" AppMag 5.90 EllipticalOrbit { Period 42.15 SemiMajorAxis 7.13 # mass ratio 0.68:0.59 Eccentricity 0.58 Inclination 136.65 AscendingNode 305.37 ArgOfPericenter 3.60 MeanAnomaly 205.84 } } "Gliese 667 C:CD-34 11626 C" { RA 259.74511327 Dec -34.99683693 Distance 23.6316 SpectralType "M1.5V" Radius 324000 # approx. for class AppMag 10.22 } "WISE 0607+2429:WISEP J060738.65+242953.4" { RA 91.91259273 Dec 24.49911608 Distance 23.8166 # 136.9449 +/- 0.6553 mas SpectralType "L9V" AbsMag 23 # approx. for radius in Celestia } # 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 1738+2732:WISE J173835.53+273259.0" { RA 264.648060 Dec 27.549749 Distance 23.936 # 136.26 +/- 4.27 mas SpectralType "Y0V" Temperature 409 Radius 64300 AbsMag 40 # extremely low } "2MASS 1507-1627:2MASS J15074769-1627386" { RA 226.94864865 Dec -16.46114400 Distance 24.1180 # 135.2332 +/- 0.3274 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 } } 3765 # HD 4628 { RA 12.09573477 Dec 5.28061376 Distance 24.2497 # 134.4990 +/- 0.0890 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 } 2021 # Bet Hyi { RA 6.43779316 Dec -77.25424612 Distance 24.327 # 134.07 +/- 0.11 mas SpectralType "G0V" AppMag 2.79 } # 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" Barycenter 5336 "MU Cas:30 Cas:Gliese 53" { RA 17.06831127 Dec 54.9203406 Distance 24.586 # 132.66 +/- 0.69 mas } "MU Cas A:30 Cas A:Gliese 53 A" { OrbitBarycenter "MU Cas" SpectralType "G5V" AppMag 5.166 Radius 548900 EllipticalOrbit { # fully specified orientation Period 21.568 SemiMajorAxis 1.4186 # mass ratio 0.7440:0.1728 Eccentricity 0.5885 Inclination 25.62 AscendingNode 344.53 ArgOfPericenter 124.96 MeanAnomaly 46.34 } } "MU Cas B:30 Cas B:Gliese 53 B" { OrbitBarycenter "MU Cas" SpectralType "MVI" AppMag 11.00 EllipticalOrbit { Period 21.568 SemiMajorAxis 6.1080 # mass ratio 0.7440:0.1728 Eccentricity 0.5885 Inclination 25.62 AscendingNode 344.53 ArgOfPericenter 304.96 MeanAnomaly 46.34 } } 7981 # 107 Psc { RA 25.62401456 Dec 20.26851674 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 { 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 } Modify 65859 # Ross 490 { Radius 341000 # approx. for class } "Giclas 141-36" { 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 } "GJ 4053:LP 71-165" { RA 274.73846839 Dec 66.19258373 Distance 24.9408 # 130.7722 +/- 0.0443 mas SpectralType "M4.5V" Radius 160000 # approx. for class AppMag 13.406 } "Fomalhaut C:ALF PsA C:LP 876-10" { RA 342.01871887 Dec -24.36881191 Distance 25.0305 # 130.3032 +/- 0.0746 mas SpectralType "M4.0Ve" Radius 160000 # approx. for class AppMag 12.624 } # rotational parameters from Monnier et al. (2012), ApJL 761 (1), L3 # "Resolving Vega and the Inclination Controversy with CHARA/MIRC" # https://arxiv.org/abs/1211.6055 Modify 91262 # Vega { SemiAxes [ 1 0.887 1 ] # equatorial radius 12.7% greater than polar UniformRotation { Period 17.04 Inclination 150.91 # inclination (i) = 6.2 AscendingNode 208.14 # pole position angle = -58 } } Modify 12781 # Gliese 109 { Radius 225000 # approx. for class } #======================================================================== # Nearby multiple star with poor Hipparcos parallax # Used Gaia DR2 parallax for B Barycenter 55203 "Alula Australis:XI UMa:53 UMa:Gliese 423:ADS 8119" { RA 169.545550 Dec 31.529289 Distance 28.4885 # 114.4867 +/- 0.4316 mas } # Masses from Fuhrmann et al. (2016), MNRAS 459 (2), 1682 # "Evidence for very nearby hidden white dwarfs" # https://doi.org/10.1093/mnras/stw760 Barycenter 1026342520 "Alula Australis A:XI UMa A:53 UMa A:Gliese 423 A:ADS 8119 A" { OrbitBarycenter "Alula Australis" EllipticalOrbit { # fully specified orientation Period 59.88 SemiMajorAxis 9.65 # mass ratio (0.98:0.38):(0.88:0.17) Eccentricity 0.40 Inclination 14.09 AscendingNode 192.13 ArgOfPericenter 9.70 MeanAnomaly 29.62 } } Barycenter 2026342520 "Alula Australis B:XI UMa B:53 UMa B:Gliese 423 B:ADS 8119 B" { OrbitBarycenter "Alula Australis" EllipticalOrbit { # fully specified orientation Period 59.88 SemiMajorAxis 12.50 # mass ratio (0.98:0.38):(0.88:0.17) Eccentricity 0.40 Inclination 14.09 AscendingNode 192.13 ArgOfPericenter 189.70 MeanAnomaly 29.62 } } "Alula Australis Aa:XI UMa Aa:53 UMa Aa:Gliese 423 Aa" { OrbitBarycenter "Alula Australis A" SpectralType "G0V" AppMag 4.33 EllipticalOrbit { # fully specified orientation Period 1.834 SemiMajorAxis 0.13 # mass ratio 0.98:0.38 Eccentricity 0.61 Inclination 146.3 AscendingNode 203.8 ArgOfPericenter 285.2 MeanAnomaly 73.4 } } "Alula Australis Ab:XI UMa Ab:53 UMa Ab" { OrbitBarycenter "Alula Australis A" SpectralType "M2V" # from mass estimate of 0.38 AbsMag 10.3 # for estimated spectral class EllipticalOrbit { # fully specified orientation Period 1.834 SemiMajorAxis 0.34 # mass ratio 0.98:0.38 Eccentricity 0.61 Inclination 146.3 AscendingNode 203.8 ArgOfPericenter 105.2 MeanAnomaly 73.4 } } "Alula Australis Ba:XI UMa Ba:53 UMa Ba:Gliese 423 Ba" { OrbitBarycenter "Alula Australis B" SpectralType "G0V" AppMag 4.8 EllipticalOrbit { Period 0.0109 # 3.981 d SemiMajorAxis 0.008 # mass ratio 0.88:0.17 Eccentricity 0 Inclination 102 # plane-of-inclination: AscendingNode 70 # 12.7 deg ArgOfPericenter 180 } UniformRotation { Inclination 102 # guess, to match orbit AscendingNode 70 } } "Alula Australis Bb:XI UMa Bb:53 UMa Bb:Gliese 423 Bb" # Fuhrmann et al. (2016) suggest it could be a white dwarf { OrbitBarycenter "Alula Australis B" SpectralType "D" AbsMag 11.3 # for approximate radius in Celestia EllipticalOrbit { Period 0.0109 # 3.981 d SemiMajorAxis 0.056 # mass ratio 0.88:0.17 Eccentricity 0 Inclination 102 # plane-of-inclination: AscendingNode 70 # 12.7 deg } UniformRotation { Inclination 102 # guess, to match orbit 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/ "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. AbsMag 40 # extremely low }