Bonner Durchmusterung +45°2684

light-years

Catalog numbers:
     Gliese (Gl) 708.4, Henry Draper (HD) 168009, Bonner Durchmusterung (BD) +45°2684, Hipparcos Input Catalog (HIC) 89474, Smithsonian Astrophysical Observatory (SAO) 47343, Hoffleit Bright Star (HR) 6847, Woolley (Wo) 9622
Age: 8400 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 18h15m32.467s, +45°12'33.7" (epoch 2000.0)
Distance from Sol: 74.0 light-years (22.7 parsecs)
Standard error in distance: 1.1438%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 3.53, -52.0, 52.5
Galactic (X,Y,Z) coordinates in ly: 19.8, 64.3, 30.9
Proper motion: 0.138 arcsec/yr (217.2° from north)
Radial Velocity: -64.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -4.91, -62.7, -22.0

What do all these fields mean?


Spectral class: G2
Luminosity Class: V
Apparent visual magnitude: +6.28
Absolute visual magnitude: +4.51
Visual luminosity: 1.37 x Sol
Color indices: B-V= +0.62, U-B= +0.12
Diameter: 1.01 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.17 A.U.s
Angular size of star in sky in CZ: 0.459385 degrees

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