Fix Gliese 105 system, standardize late brown dwarf radii
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bbee112b1b
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@ -1133,7 +1133,7 @@ Barycenter 54211 "Gliese 412:Lalande 21258" # orbits of A & B unknown
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Dec -47.01426260
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Dec -47.01426260
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Distance 15.8847 # 205.3266 +/- 0.2545 mas
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Distance 15.8847 # 205.3266 +/- 0.2545 mas
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SpectralType "L9V"
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SpectralType "L9V"
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Radius 70000 # approx.
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Radius 60000 # approx.
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AppMag 22.921
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AppMag 22.921
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}
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}
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@ -1347,6 +1347,7 @@ Barycenter "GJ 1116" # orbit of A & B unknown
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Distance 16.8516 # 193.5457 +/- 0.9420 mas
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Distance 16.8516 # 193.5457 +/- 0.9420 mas
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AppMag 17.48 # calculated from J, H, and Ks bands
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AppMag 17.48 # calculated from J, H, and Ks bands
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SpectralType "T6"
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SpectralType "T6"
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Radius 60000 # approx.
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RotationPeriod 1.74
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RotationPeriod 1.74
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Temperature 1000
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Temperature 1000
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}
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}
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@ -2779,7 +2780,7 @@ Barycenter "Scholz's Star:WISE 0720-0846:WISE J072003.20-084651.2"
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}
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}
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# Used parallax of component B, from Gaia DR2
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# Used parallax of component B, from Gaia DR2
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# Winters et al. (2019), eprint arXiv 1906.10147
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# Winters et al. (2019), AJ 158 (4), 152
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# "Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple
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# "Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple
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# M Dwarf System at 6.9 Parsecs"
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# M Dwarf System at 6.9 Parsecs"
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# https://arxiv.org/abs/1906.10147
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# https://arxiv.org/abs/1906.10147
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@ -2962,33 +2963,21 @@ Modify 103096 # Gliese 809
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# Distance from average of distances from Gaia DR2 parallax for A and B
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# Distance from average of distances from Gaia DR2 parallax for A and B
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Barycenter "Gliese 105" # orbit of (AB) and C unknown
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Barycenter "Gliese 105" # orbit of (AB) and C unknown
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{
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{
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RA 39.027432618 # mass ratio ((0.81:0.08):0.17):0.21
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RA 39.028581069 # mass ratio (0.81:0.082):0.21
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Dec 6.884370406 # A: 138.2084 +/- 0.1436 mas
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Dec 6.883949884 # A: 138.2084 +/- 0.1436 mas
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Distance 23.577 # B: 138.4637 +/- 0.0886 mas
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Distance 23.591 # B: 138.4637 +/- 0.0886 mas
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}
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}
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Barycenter 12114 "Gliese 105 A-B"
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# Masses from Golimowski et al. (2002), AJ 120 (4), 2082
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# "The Very Low Mass Component of the Gliese 105 System"
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# https://iopscience.iop.org/article/10.1086/301567
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Barycenter 12114 "Gliese 105 A"
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{
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{
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RA 39.020265166 # mass ratio (0.81:0.08):0.17
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RA 39.020334067 # mass ratio 0.81:0.082
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Dec 6.886891351
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Dec 6.886846623
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Distance 23.599 # 138.2084 +/- 0.1436 mas
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Distance 23.599 # 138.2084 +/- 0.1436 mas
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}
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}
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Barycenter "Gliese 105 A"
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{
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OrbitBarycenter "Gliese 105"
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EllipticalOrbit {
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Period 201
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SemiMajorAxis 6.1 # mass ratio (0.81:0.08):0.17
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Eccentricity 0.4
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Inclination 132.2
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AscendingNode 6.4
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ArgOfPericenter 277.2
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MeanAnomaly 351.0
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}
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}
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"Gliese 105 Aa"
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"Gliese 105 Aa"
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{
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{
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OrbitBarycenter "Gliese 105 A"
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OrbitBarycenter "Gliese 105 A"
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@ -2997,7 +2986,7 @@ Barycenter "Gliese 105 A"
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EllipticalOrbit {
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EllipticalOrbit {
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Period 61
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Period 61
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SemiMajorAxis 0.11 # mass ratio 0.81:0.08
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SemiMajorAxis 0.11 # mass ratio 0.81:0.082
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Eccentricity 0.67
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Eccentricity 0.67
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Inclination 61
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Inclination 61
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AscendingNode 356
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AscendingNode 356
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@ -3006,15 +2995,15 @@ Barycenter "Gliese 105 A"
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}
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}
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}
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}
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"Gliese 105 Ab"
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"Gliese 105 Ab" # SIMBAD calls it GJ 105 C
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{
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{
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OrbitBarycenter "Gliese 105 A"
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OrbitBarycenter "Gliese 105 A"
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SpectralType "M7.5V"
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SpectralType "M7V"
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AppMag 16.90
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AppMag 16.77
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EllipticalOrbit {
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EllipticalOrbit {
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Period 61
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Period 61
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SemiMajorAxis 1.13 # mass ratio 0.81:0.08
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SemiMajorAxis 1.13 # mass ratio 0.81:0.082
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Eccentricity 0.67
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Eccentricity 0.67
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Inclination 61
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Inclination 61
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AscendingNode 356
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AscendingNode 356
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@ -3023,26 +3012,7 @@ Barycenter "Gliese 105 A"
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}
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}
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}
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}
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# Spectral type from same source as orbit; mass and magnitude estimated
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"BX Cet:Gliese 105 B"
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# from spectral type
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"Gliese 105 B"
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{
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OrbitBarycenter "Gliese 105"
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SpectralType "M4.5V"
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AbsMag 12.6 # guess from spectral type
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EllipticalOrbit {
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Period 201
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SemiMajorAxis 32.2 # mass ratio (0.81:0.08):0.17
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Eccentricity 0.4
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Inclination 132.2
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AscendingNode 6.4
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ArgOfPericenter 97.2
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MeanAnomaly 351.0
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}
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}
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"BX Cet:Gliese 105 C" # SIMBAD calls it GJ 105 B
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{
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{
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RA 39.06361119
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RA 39.06361119
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Dec 6.87164564
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Dec 6.87164564
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