Bonner Durchmusterung +70°395

light-years

Catalog numbers:
     Woolley (Wo) 9205, Henry Draper (HD) 42250, Bonner Durchmusterung (BD) +70°395, Giclas (G) 251-5, Hipparcos Input Catalog (HIC) 29761, Smithsonian Astrophysical Observatory (SAO) 5793, AGK3 Reference (AGK3R) 5553, Luyten Two-Tenth (LTT) 11803
Age: 9400 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 6h16m2.671s, +70°46'53.55" (epoch 2000.0)
Distance from Sol: 83.9 light-years (25.7 parsecs)
Standard error in distance: 1.8673%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -1.93, 27.5, 79.2
Galactic (X,Y,Z) coordinates in ly: -62.2, 45.6, 32.9
Proper motion: 0.444 arcsec/yr (180.6° from north)
Radial Velocity: 25 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -54.2, -24.1, -5.38

What do all these fields mean?


Spectral class: G7
Luminosity Class: V
Apparent visual magnitude: +7.44
Absolute visual magnitude: +5.39
Visual luminosity: 0.61 x Sol
Color indices: B-V= +0.77, U-B= +0.37
Diameter: 0.88 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.78 A.U.s
Angular size of star in sky in CZ: 0.600266 degrees

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