Catalogue Astrographique +16°247-80

light-years

Catalog numbers:
     Gliese (Gl) 731, Henry Draper Extension (HDE) 229793, Giclas (G) 184-35, Luyten Half-Second (LHS) 3417, Hipparcos Input Catalog (HIC) 92573, Vyssotsky McCormick (McC) 186, Catalogue Astrographique (AC) +16°247-80
Arity: singular
Right Ascension and Declination: 18h51m51.176s, +16°34'59.96" (epoch 2000.0)
Distance from Sol: 50.9 light-years (15.6 parsecs)
Standard error in distance: 2.7449%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 10.9, -47.5, 14.5
Galactic (X,Y,Z) coordinates in ly: 33.7, 37.6, 6.14
Proper motion: 0.537 arcsec/yr (207.9° from north)
Radial Velocity: -14.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 19.6, -37.6, -0.89

What do all these fields mean?


Spectral class: M1.5
Luminosity Class: V
Apparent visual magnitude: +10.16
Absolute visual magnitude: +9.19
Visual luminosity: 0.018 x Sol
Color indices: B-V= +1.47, U-B= +1.14, R-I= +0.73
Comfort Zone (visual): 0.14 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.