Bonner Durchmusterung -20°6558

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 2154, Bonner Durchmusterung (BD) -20°6558, Hipparcos Input Catalog (HIC) 114719, UGPMF 601, Luyten Two-Tenth (LTT) 9423
Arity: binary
Right Ascension and Declination: 23h14m16.638s, -19°38'39.09" (epoch 2000.0)
Distance from Sol: 63 light-years (19 parsecs)
Standard error in distance: 10.1171%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 59, -12, -21
Galactic (X,Y,Z) coordinates in ly: 17, 18, -58
Proper motion: 0.454 arcsec/yr (84.0° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +9.12
Combined visual luminosity: 0.02 x Sol
Observed Separation: 117 A.U.s
As seen from A:
     B would appear as magnitude -8.88
As seen from B:
     A would appear as magnitude -12.06


Component A:
Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +10.62
Absolute visual magnitude: +9.18
Visual luminosity: 0.02 x Sol
Color indices: B-V= +1.46, U-B= +1.22, R-I= +0.78
Comfort Zone (visual): 0.1 A.U.s


Component B:
Catalog numbers:
     Luyten Palomar (LP) 822-105
Right Ascension and Declination: 23h11m32s, -19°55'12" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 58, -13, -22
Galactic (X,Y,Z) coordinates in ly: 17, 18, -58
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +13.80
Absolute visual magnitude: +12.36
Visual luminosity: 0.0010 x Sol
Color indices: B-V= +1.60, U-B= +1.14, R-I= +1.18
Comfort Zone (visual): 0.03 A.U.s

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.