Bonner Durchmusterung +2°3312

light-years

Catalog numbers:
     Gliese (Gl) 673, Henry Draper (HD) 157881, Bonner Durchmusterung (BD) +2°3312, Luyten Half-Second (LHS) 447, Hipparcos Input Catalog (HIC) 85295, Smithsonian Astrophysical Observatory (SAO) 122374, Vyssotsky McCormick (McC) 794, AGK3 Reference (AGK3R) 15538
Heavy element abundance: 251% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 17h25m45.257s, +2°6'41.15" (epoch 2000.0)
Distance from Sol: 25.18 light-years (7.720 parsecs)
Standard error in distance: 0.728%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -3.746, -24.88, 0.928
Galactic (X,Y,Z) coordinates in ly: 21.52, 10.05, 8.364
Proper motion: 1.315 arcsec/yr (206.1° from north)
Radial Velocity: -23.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 1.015, -52.60, -9.543

What do all these fields mean?


Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +7.54
Absolute visual magnitude: +8.10
Visual luminosity: 0.0499 x Sol
Color indices: B-V= +1.36, U-B= +1.27, R-I= +0.60
Diameter: 0.830 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.223 A.U.s
Angular size of star in sky in CZ: 1.979498 degrees

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