Bonner Durchmusterung +31°2875

light-years

Catalog numbers:
     Gliese (Gl) 632.1, Henry Draper (HD) 149957, Bonner Durchmusterung (BD) +31°2875, Giclas (G) 169-20, Luyten Half-Second (LHS) 3226, Hipparcos Input Catalog (HIC) 81348, Smithsonian Astrophysical Observatory (SAO) 65431, Vyssotsky McCormick (McC) 771, Woolley (Wo) 9569
Arity: singular
Right Ascension and Declination: 16h36m49.081s, +31°5'49.24" (epoch 2000.0)
Distance from Sol: 83.5 light-years (25.6 parsecs)
Standard error in distance: 3.1986%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -25.4, -66.9, 43.2
Galactic (X,Y,Z) coordinates in ly: 39.2, 49.7, 54.5
Proper motion: 0.553 arcsec/yr (142.4° from north)
Radial Velocity: -10.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 50.4, -7.86, -44.9

What do all these fields mean?


Spectral class: K6
Luminosity Class: V
Apparent visual magnitude: +9.49
Absolute visual magnitude: +7.45
Visual luminosity: 0.091 x Sol
Color indices: B-V= +1.20, U-B= +1.16, R-I= +0.46
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.30 A.U.s
Angular size of star in sky in CZ: 1.199117 degrees

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