Bonner Durchmusterung +32°1695

light-years

Catalog numbers:
     Woolley (Wo) 9256, Henry Draper (HD) 68017, Bonner Durchmusterung (BD) +32°1695, Luyten Half-Second (LHS) 1987, Hipparcos Input Catalog (HIC) 40118, Smithsonian Astrophysical Observatory (SAO) 60631, AGK3 Reference (AGK3R) 7375, Luyten FT (LFT) 567
Age: 5900 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 8h11m38.6s, +32°27'25.8" (epoch 2000.0)
Distance from Sol: 70.8 light-years (21.7 parsecs)
Standard error in distance: 1.9587%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -32.5, 50.2, 38.0
Galactic (X,Y,Z) coordinates in ly: -60.0, -10.3, 36.2
Proper motion: 0.807 arcsec/yr (215.7° from north)
Radial Velocity: 30.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -49.3, -62.0, -39.5

What do all these fields mean?


Spectral class: G4
Luminosity Class: V
Apparent visual magnitude: +6.83
Absolute visual magnitude: +5.14
Visual luminosity: 0.76 x Sol
Color indices: B-V= +0.69, U-B= +0.13
Diameter: 0.95 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.87 A.U.s
Angular size of star in sky in CZ: 0.579660 degrees

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