Bonner Durchmusterung -13°5945

light-years

Catalog numbers:
     Gliese (Gl) 830, Henry Draper (HD) 204587, Bonner Durchmusterung (BD) -13°5945, Luyten Half-Second (LHS) 509, Hipparcos Input Catalog (HIC) 106147, Smithsonian Astrophysical Observatory (SAO) 164435, Vyssotsky McCormick (McC) 202
Arity: singular
Right Ascension and Declination: 21h30m2.74s, -12°30'36.34" (epoch 2000.0)
Distance from Sol: 58.9 light-years (18.1 parsecs)
Standard error in distance: 2.5%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 45.6, -35.0, -12.8
Galactic (X,Y,Z) coordinates in ly: 33.6, 28.7, -38.9
Proper motion: 1.059 arcsec/yr (104.5° from north)
Radial Velocity: -84.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -104, -65.9, -11.3

What do all these fields mean?


Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +9.11
Absolute visual magnitude: +7.82
Visual luminosity: 0.065 x Sol
Color indices: B-V= +1.28, U-B= +1.24, R-I= +0.55
Diameter: 0.69 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.25 A.U.s
Angular size of star in sky in CZ: 1.446269 degrees

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