Bonner Durchmusterung +61°2068

light-years

Catalog numbers:
     Gliese (Gl) 809, Henry Draper (HD) 199305, Bonner Durchmusterung (BD) +61°2068, Giclas (G) 231-19, Luyten Half-Second (LHS) 3595, Hipparcos Input Catalog (HIC) 103096, Vyssotsky McCormick (McC) 199
Arity: singular
Right Ascension and Declination: 20h53m19.87s, +62°9'16.1" (epoch 2000.0)
Distance from Sol: 22.98 light-years (7.045 parsecs)
Standard error in distance: 0.5395%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 7.365, -7.807, 20.32
Galactic (X,Y,Z) coordinates in ly: -3.505, 22.27, 4.431
Proper motion: 0.772 arcsec/yr (180.5° from north)
Radial Velocity: -17 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 21.98, -10.28, -19.10

What do all these fields mean?


NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +8.55
Absolute visual magnitude: +9.31
Visual luminosity: 0.0164 x Sol
Color indices: B-V= +1.48, U-B= +1.24, R-I= +0.82
Diameter: 0.583 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.128 A.U.s
Angular size of star in sky in CZ: 2.429168 degrees

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