Bonner Durchmusterung +80°238

light-years

Catalog numbers:
     Gliese (Gl) 290, Henry Draper (HD) 62613, Bonner Durchmusterung (BD) +80°238, Luyten Half-Second (LHS) 5130, Hipparcos Input Catalog (HIC) 38784, Smithsonian Astrophysical Observatory (SAO) 1254, Hoffleit Bright Star (HR) 2997
Age: 5200 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 7h56m17.098s, +80°15'56.14" (epoch 2000.0)
Distance from Sol: 55.59 light-years (17.04 parsecs)
Standard error in distance: 0.9622%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -4.567, 8.215, 54.79
Galactic (X,Y,Z) coordinates in ly: -33.35, 34.84, 27.63
Proper motion: 0.489 arcsec/yr (279.2° from north)
Radial Velocity: -7.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -10.48, 8.484, -37.83

What do all these fields mean?


Spectral class: G8
Luminosity Class: V
Apparent visual magnitude: +6.55
Absolute visual magnitude: +5.40
Visual luminosity: 0.604 x Sol
Color indices: B-V= +0.73, U-B= +0.28
Diameter: 0.86 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.777 A.U.s
Angular size of star in sky in CZ: 0.589845 degrees

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