Bonner Durchmusterung +8°4638

light-years

Catalog numbers:
     Gliese (Gl) 824, Henry Draper (HD) 202575, Bonner Durchmusterung (BD) +8°4638, Hipparcos Input Catalog (HIC) 105038, Smithsonian Astrophysical Observatory (SAO) 126671, Vyssotsky McCormick (McC) 833
Arity: singular
Right Ascension and Declination: 21h16m32.462s, +9°23'37.55" (epoch 2000.0)
Distance from Sol: 52.8 light-years (16.2 parsecs)
Standard error in distance: 1.6855%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 39.4, -34.1, 8.61
Galactic (X,Y,Z) coordinates in ly: 22.9, 41.1, -23.8
Proper motion: 0.184 arcsec/yr (130.2° from north)
Radial Velocity: -18.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -10.4, -20.2, -4.33

What do all these fields mean?


Spectral class: K8
Luminosity Class: V
Apparent visual magnitude: +7.92
Absolute visual magnitude: +6.87
Visual luminosity: 0.16 x Sol
Color indices: B-V= +1.02, U-B= +0.84, R-I= +0.40
Diameter: 1.46 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.39 A.U.s
Angular size of star in sky in CZ: 1.976160 degrees

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