Ross 991

light-years

Catalog numbers:
     Giclas (G) 123-60, Luyten Half-Second (LHS) 2633, Hipparcos Input Catalog (HIC) 62374, Ross 991, Luyten FT (LFT) 941, Luyten Two-Tenth (LTT) 13622
Arity: singular
Right Ascension and Declination: 12h47m0.995s, +46°37'33.64" (epoch 2000.0)
Distance from Sol: 65.4 light-years (20.0 parsecs)
Standard error in distance: 2.5966%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -44.0, -9.15, 47.5
Galactic (X,Y,Z) coordinates in ly: -12.0, 17.8, 61.7
Proper motion: 0.814 arcsec/yr (250.1° from north)
Source for proper motion: Gliese

What do all these fields mean?


Spectral class: M2.5
Luminosity Class: V-VI
Apparent visual magnitude: +11.76
Absolute visual magnitude: +10.25
Visual luminosity: 0.0069 x Sol
Color indices: B-V= +1.50, R-I= +1.03
Comfort Zone (visual): 0.083 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.