Bonner Durchmusterung +46°1398

light-years

Catalog numbers:
     Gliese (Gl) 307.1, Henry Draper (HD) 71148, Bonner Durchmusterung (BD) +46°1398, Hipparcos Input Catalog (HIC) 41484, Smithsonian Astrophysical Observatory (SAO) 42369, FK4 Supplement (FK4 Sup) 2660, Hoffleit Bright Star (HR) 3309, Woolley (Wo) 9264
Age: 5600 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 8h27m36.802s, +45°39'10.85" (epoch 2000.0)
Distance from Sol: 71.1 light-years (21.8 parsecs)
Standard error in distance: 1.7976%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -29.8, 39.7, 50.8
Galactic (X,Y,Z) coordinates in ly: -57.2, 5.25, 41.8
Proper motion: 0.353 arcsec/yr (182.5° from north)
Radial Velocity: -31.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 20.0, -38.2, -22.1

What do all these fields mean?


Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +6.33
Absolute visual magnitude: +4.64
Visual luminosity: 1.21 x Sol
Color indices: B-V= +0.62, U-B= +0.12
Diameter: 0.99 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.10 A.U.s
Angular size of star in sky in CZ: 0.479257 degrees

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