Giclas 108-21

light-years

Arity: binary
Right Ascension and Declination: 6h39m33s, +3°37'53" (epoch 1950.0)
Distance from Sol: 51 light-years (16 parsecs)
Standard error in distance: 12.3288%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -8.7, 50, 3.2
Galactic (X,Y,Z) coordinates in ly: -45, -24, -0.4
Proper motion: 0.287 arcsec/yr (173.0° 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: +10.80
Combined visual luminosity: 0.004 x Sol
Observed Separation: 797 A.U.s
As seen from A:
     B would appear as magnitude -4.70
As seen from B:
     A would appear as magnitude -5.97


Component A:
Catalog numbers:
     Giclas (G) 108-21
Spectral class: M
Luminosity Class: V-VI
Apparent visual magnitude: +12.06
Absolute visual magnitude: +11.09
Visual luminosity: 0.003 x Sol
Color indices: R-I= +1.11
Comfort Zone (visual): 0.06 A.U.s


Component B:
Catalog numbers:
     Giclas (G) 108-22
Right Ascension and Declination: 6h39m36s, +3°38'36" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -8.7, 50, 3.2
Galactic (X,Y,Z) coordinates in ly: -45, -24, -0.4
Spectral class: M
Luminosity Class: V-VI
Apparent visual magnitude: +13.33
Absolute visual magnitude: +12.36
Visual luminosity: 0.0010 x Sol
Color indices: R-I= +1.22
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.