Bonner Durchmusterung +22°4409

light-years

Catalog numbers:
     Bonner Durchmusterung (BD) +22°4409, Giclas (G) 145-43, Hipparcos Input Catalog (HIC) 106231, Vyssotsky McCormick (McC) 890
Arity: singular
Right Ascension and Declination: 21h31m1.688s, +23°20'6.06" (epoch 2000.0)
Distance from Sol: 81.7 light-years (25.1 parsecs)
Standard error in distance: 2.8717%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 59.7, -45.4, 32.4
Galactic (X,Y,Z) coordinates in ly: 20.0, 74.0, -28.4
Proper motion: 0.205 arcsec/yr (140.8° from north)
Radial Velocity: -23 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -5.01, -29.7, -14.7

What do all these fields mean?


Spectral class: K8
Luminosity Class: V
Apparent visual magnitude: +9.25
Absolute visual magnitude: +7.26
Visual luminosity: 0.11 x Sol
Color indices: B-V= +1.05, U-B= +0.80, R-I= +0.50
Comfort Zone (visual): 0.33 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.