Bonner Durchmusterung -20°643

light-years

Catalog numbers:
     Gliese (Gl) 142, Henry Draper (HD) 21531, Bonner Durchmusterung (BD) -20°643 , Luyten Half-Second (LHS) 1548 , Hipparcos Input Catalog (HIC) 16134, Smithsonian Astrophysical Observatory (SAO) 148971, Vyssotsky McCormick (McC) 101, Southern Reference System (SRS) 5095
Arity: singular
Right Ascension and Declination: 3h27m52.42s, -19°48'15.84" (epoch 2000.0)
Distance from Sol: 41.2 light-years (12.6 parsecs)
Standard error in distance: 2.7604%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 23.9, 30.5, -13.9
Galactic (X,Y,Z) coordinates in ly: -21.5, -12.4, -32.9
Proper motion: 0.616 arcsec/yr (59.1° from north)
Radial Velocity: 37.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -48.4, -19.5, -8.51

What do all these fields mean?


Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +8.39
Absolute visual magnitude: +7.88
Visual luminosity: 0.061 x Sol
Color indices: B-V= +1.33
Diameter: 0.72 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: 1.551080 degrees

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