Bonner Durchmusterung -20°6185

light-years

Catalog numbers:
     Gliese (Gl) 826.1, Henry Draper (HD) 203040, Bonner Durchmusterung (BD) -20°6185, Luyten Half-Second (LHS) 3657, Hipparcos Input Catalog (HIC) 105341, Smithsonian Astrophysical Observatory (SAO) 190243, Vyssotsky McCormick (McC) 201, Woolley (Wo) 9736
Arity: singular
Right Ascension and Declination: 21h20m13.835s, -19°51'8.42" (epoch 2000.0)
Distance from Sol: 53.4 light-years (16.4 parsecs)
Standard error in distance: 2.101%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 38.5, -32.3, -18.1
Galactic (X,Y,Z) coordinates in ly: 34.3, 20.0, -35.7
Proper motion: 0.744 arcsec/yr (193.6° from north)
Radial Velocity: 15.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 35.5, -45.8, -14.8

What do all these fields mean?


Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +9.10
Absolute visual magnitude: +8.03
Visual luminosity: 0.053 x Sol
Color indices: B-V= +1.35, U-B= +1.26, R-I= +0.61
Diameter: 0.72 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.23 A.U.s
Angular size of star in sky in CZ: 1.661101 degrees

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