Bonner Durchmusterung +1°131

light-years

Catalog numbers:
     Gliese (Gl) 31.4, Henry Draper (HD) 4256, Bonner Durchmusterung (BD) +1°131, Luyten Half-Second (LHS) 1141, Hipparcos Input Catalog (HIC) 3535, Smithsonian Astrophysical Observatory (SAO) 109432
Arity: singular
Right Ascension and Declination: 0h45m4.877s, +1°47'7.57" (epoch 2000.0)
Distance from Sol: 71.8 light-years (22.0 parsecs)
Standard error in distance: 2.0483%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 70.4, 14.0, 2.24
Galactic (X,Y,Z) coordinates in ly: -18.1, 30.0, -62.7
Proper motion: 0.572 arcsec/yr (185.3° from north)
Radial Velocity: 9.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 30.4, -36.4, -37.5

What do all these fields mean?


Spectral class: K2
Luminosity Class: V
Apparent visual magnitude: +8.03
Absolute visual magnitude: +6.32
Visual luminosity: 0.26 x Sol
Color indices: B-V= +1.00
Diameter: 0.83 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.51 A.U.s
Angular size of star in sky in CZ: 0.870669 degrees

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