Bonner Durchmusterung +49°1280

light-years

Catalog numbers:
     Gliese (Gl) 181, Bonner Durchmusterung (BD) +49°1280, Vyssotsky McCormick (McC) 109
Arity: singular
Right Ascension and Declination: 4h58m50.501s, +49°50'57.3" (epoch 2000.0)
Distance from Sol: 57 light-years (17 parsecs)
Standard error in distance: 10.1246%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 9.6, 35, 43
Galactic (X,Y,Z) coordinates in ly: -52, 21, 4.9
Proper motion: 0.155 arcsec/yr (136.7° from north)
Radial Velocity: -33.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 27, -24, -1.7

What do all these fields mean?


Spectral class: M2e
Luminosity Class: V
Apparent visual magnitude: +9.78
Absolute visual magnitude: +8.59
Visual luminosity: 0.03 x Sol
Color indices: B-V= +1.44, U-B= +1.22, R-I= +0.71
Comfort Zone (visual): 0.2 A.U.s

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