Bonner Durchmusterung +29°3423

light-years

Catalog numbers:
     Woolley (Wo) 9639, Henry Draper (HD) 176377, Bonner Durchmusterung (BD) +29°3423, Hipparcos Input Catalog (HIC) 93185, Smithsonian Astrophysical Observatory (SAO) 67661, Luyten Two-Tenth (LTT) 15573
Age: 3800 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 18h58m51.001s, +30°10'50.3" (epoch 2000.0)
Distance from Sol: 76.4 light-years (23.4 parsecs)
Standard error in distance: 1.4774%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 16.8, -63.9, 38.4
Galactic (X,Y,Z) coordinates in ly: 36.1, 65.6, 15.2
Proper motion: 0.2 arcsec/yr (15.4° from north)
Radial Velocity: -39.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -38.2, -24.0, -4.14

What do all these fields mean?


Spectral class: G2
Luminosity Class: V
Apparent visual magnitude: +6.77
Absolute visual magnitude: +4.92
Visual luminosity: 0.94 x Sol
Color indices: B-V= +0.58, U-B= +0.00
Diameter: 0.97 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.97 A.U.s
Angular size of star in sky in CZ: 0.533844 degrees

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