Bonner Durchmusterung +171320


Catalog numbers:
     Gliese (Gl) 239, Henry Draper Extension (HDE) 260655, Bonner Durchmusterung (BD) +171320, Giclas (G) 104-49, Luyten Half-Second (LHS) 1858, Hipparcos Input Catalog (HIC) 31635
Arity: singular
Right Ascension and Declination: 6h37m10.76s, +17°33'52.8" (epoch 2000.0)
Distance from Sol: 32.1 light-years (9.84 parsecs)
Standard error in distance: 2.2609%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -4.94, 30.2, 9.69
Galactic (X,Y,Z) coordinates in ly: -30.7, -8.83, 3.06
Proper motion: 0.885 arcsec/yr (293.4° from north)
Radial Velocity: -56.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 42.5, 45.3, -31.5

What do all these fields mean?

Spectral class: M1
Luminosity Class: V
Apparent visual magnitude: +9.63
Absolute visual magnitude: +9.67
Visual luminosity: 0.012 x Sol
Color indices: B-V= +1.49, U-B= +1.21, R-I= +0.73
Comfort Zone (visual): 0.11 A.U.s

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