Bonner Durchmusterung +21652

light-years

Catalog numbers:
     Gliese (Gl) 169, Henry Draper (HD) 28343, Bonner Durchmusterung (BD) +21652, Hipparcos Input Catalog (HIC) 20917, Smithsonian Astrophysical Observatory (SAO) 76626, Vyssotsky McCormick (McC) 8, AGK3 Reference (AGK3R) 3969, New Suspected Variable (NSV) 1612
Arity: singular
Right Ascension and Declination: 4h29m0.111s, +21°55'21.49" (epoch 2000.0)
Distance from Sol: 37.4 light-years (11.5 parsecs)
Standard error in distance: 1.1902%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 13.4, 32.0, 14.0
Galactic (X,Y,Z) coordinates in ly: -35.6, 2.60, -11.2
Proper motion: 0.185 arcsec/yr (337.4° from north)
Radial Velocity: -31.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 29.6, 7.45, 12.4

What do all these fields mean?


Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +8.72
Absolute visual magnitude: +8.42
Visual luminosity: 0.037 x Sol
Color indices: B-V= +1.35, U-B= +1.22, R-I= +0.62
Diameter: 0.71 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.19 A.U.s
Angular size of star in sky in CZ: 1.961001 degrees

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