Catalogue Astrographique +55°50103

light-years

Catalog numbers:
     Gliese (Gl) 781, Giclas (G) 230-26, Luyten Half-Second (LHS) 482, Hipparcos Input Catalog (HIC) 98906, Catalogue Astrographique (AC) +55°50103
Arity: singular
Right Ascension and Declination: 20h5m2.208s, +54°26'2.97" (epoch 2000.0)
Distance from Sol: 51.6 light-years (15.8 parsecs)
Standard error in distance: 9.2436%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 15.6, -25.6, 42.0
Galactic (X,Y,Z) coordinates in ly: 1.05, 50.5, 10.6
Proper motion: 1.455 arcsec/yr (232.7° from north)
Radial Velocity: -148 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 98.1, -155, 9.08

What do all these fields mean?


NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: M3e
Luminosity Class: V
Apparent visual magnitude: +11.98
Absolute visual magnitude: +10.99
Visual luminosity: 0.0035 x Sol
Color indices: B-V= +1.54, R-I= +0.82
Comfort Zone (visual): 0.059 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.