Bonner Durchmusterung +21°3198

light-years

Catalog numbers:
     Gliese (Gl) 692.1, Henry Draper (HD) 161198, Bonner Durchmusterung (BD) +21°3198, Giclas (G) 170-61, Luyten Half-Second (LHS) 3319, Hipparcos Input Catalog (HIC) 86722, Smithsonian Astrophysical Observatory (SAO) 85357, Woolley (Wo) 9601
Age: 7600 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 17h43m15.634s, +21°36'32.56" (epoch 2000.0)
Distance from Sol: 76.8 light-years (23.6 parsecs)
Standard error in distance: 2.2565%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -5.21, -71.2, 28.3
Galactic (X,Y,Z) coordinates in ly: 48.8, 50.6, 31.0
Proper motion: 0.655 arcsec/yr (191.4° from north)
Radial Velocity: 24.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 70.9, -30.2, -1.90

What do all these fields mean?


Spectral class: K0
Luminosity Class: V
Apparent visual magnitude: +7.51
Absolute visual magnitude: +5.65
Visual luminosity: 0.48 x Sol
Color indices: B-V= +0.77, U-B= +0.30, R-I= +0.29
Diameter: 0.86 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.69 A.U.s
Angular size of star in sky in CZ: 0.663134 degrees

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