Bonner Durchmusterung +20°802

light-years

Catalog numbers:
     Gliese (Gl) 174, Henry Draper (HD) 29697, Bonner Durchmusterung (BD) +20°802, Hipparcos Input Catalog (HIC) 21818, Smithsonian Astrophysical Observatory (SAO) 76708
Arity: singular
Right Ascension and Declination: 4h41m18.818s, +20°54'5.19" (epoch 2000.0)
Distance from Sol: 44.0 light-years (13.5 parsecs)
Standard error in distance: 1.6452%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 13.8, 38.7, 15.7
Galactic (X,Y,Z) coordinates in ly: -42.3, 1.07, -12.1
Proper motion: 0.353 arcsec/yr (223.5° from north)
Radial Velocity: 7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -0.68, -3.16, -23.4

What do all these fields mean?


Spectral class: K3
Luminosity Class: V
Apparent visual magnitude: +8.00
Absolute visual magnitude: +7.35
Visual luminosity: 0.10 x Sol
Color indices: B-V= +1.10, U-B= +0.91, R-I= +0.49
Diameter: 0.72 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.32 A.U.s
Angular size of star in sky in CZ: 1.211625 degrees

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