Bonner Durchmusterung +6°4741

light-years

Catalog numbers:
     Gliese (Gl) 818, Henry Draper (HD) 200779, Bonner Durchmusterung (BD) +6°4741, Luyten Half-Second (LHS) 3624, Hipparcos Input Catalog (HIC) 104092, Smithsonian Astrophysical Observatory (SAO) 126533, Vyssotsky McCormick (McC) 831
Arity: singular
Right Ascension and Declination: 21h5m19.72s, +7°4'8.5" (epoch 2000.0)
Distance from Sol: 48.4 light-years (14.8 parsecs)
Standard error in distance: 1.9642%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 34.7, -33.2, 5.96
Galactic (X,Y,Z) coordinates in ly: 23.7, 36.5, -21.2
Proper motion: 0.572 arcsec/yr (172.5° from north)
Radial Velocity: -65.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -13.9, -75.7, 4.19

What do all these fields mean?


Spectral class: K6
Luminosity Class: V
Apparent visual magnitude: +8.27
Absolute visual magnitude: +7.42
Visual luminosity: 0.094 x Sol
Color indices: B-V= +1.22, U-B= +1.16, R-I= +0.50
Diameter: 0.78 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.31 A.U.s
Angular size of star in sky in CZ: 1.355402 degrees

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