Bonner Durchmusterung +15°4026

light-years

Catalog numbers:
     Gliese (Gl) 775.1, Henry Draper (HD) 190067, Bonner Durchmusterung (BD) +15°4026, Luyten Half-Second (LHS) 3507, Hipparcos Input Catalog (HIC) 98677, Smithsonian Astrophysical Observatory (SAO) 105581, Woolley (Wo) 9681
Age: 4500 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 20h2m34.186s, +15°35'31.73" (epoch 2000.0)
Distance from Sol: 63.1 light-years (19.3 parsecs)
Standard error in distance: 1.5797%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 31.0, -52.3, 17.0
Galactic (X,Y,Z) coordinates in ly: 35.3, 51.4, -9.22
Proper motion: 0.598 arcsec/yr (195.9° from north)
Radial Velocity: 20 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 53.5, -15.4, -17.6

What do all these fields mean?


Spectral class: G8
Luminosity Class: V
Apparent visual magnitude: +7.17
Absolute visual magnitude: +5.73
Visual luminosity: 0.44 x Sol
Color indices: B-V= +0.71, U-B= +0.23, R-I= +0.27
Diameter: 0.88 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.67 A.U.s
Angular size of star in sky in CZ: 0.704828 degrees

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