Bonner Durchmusterung +66°1281

light-years

Catalog numbers:
     Gliese (Gl) 788, Henry Draper (HD) 193664, Bonner Durchmusterung (BD) +66°1281, Luyten Half-Second (LHS) 3537, Hipparcos Input Catalog (HIC) 100017, Smithsonian Astrophysical Observatory (SAO) 18796, Hoffleit Bright Star (HR) 7783
Age: 4700 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Heavy element abundance: 115% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 20h17m31.293s, +66°51'13.26" (epoch 2000.0)
Distance from Sol: 57.30 light-years (17.57 parsecs)
Standard error in distance: 0.9053%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 12.72, -18.59, 52.69
Galactic (X,Y,Z) coordinates in ly: -10.11, 53.87, 16.71
Proper motion: 0.549 arcsec/yr (57.6° from north)
Radial Velocity: -4.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -40.38, -5.917, -21.13

What do all these fields mean?


Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +5.92
Absolute visual magnitude: +4.70
Visual luminosity: 1.153 x Sol
Color indices: B-V= +0.58, U-B= +0.06
Diameter: 1.190 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.074 A.U.s
Angular size of star in sky in CZ: 0.590557 degrees

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