Vega

light-years
Proper names: Vega, Alpha Lyrae, 3 Lyrae, Wega
Catalog numbers:
     Gliese (Gl) 721, Henry Draper (HD) 172167, Bonner Durchmusterung (BD) +38°3238, Hipparcos Input Catalog (HIC) 91262, Smithsonian Astrophysical Observatory (SAO) 67174, Fifth Fundamental Catalogue (FK5) 699, Hoffleit Bright Star (HR) 7001, Luyten Two-Tenth (LTT) 15486
Heavy element abundance: 63% of Sol
Standard error in heavy element abundance: 17%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 18h36m56.332s, +38°47'1.17" (epoch 2000.0)
Distance from Sol: 25.30 light-years (7.756 parsecs)
Standard error in distance: 0.4248%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 3.165, -19.46, 15.85
Galactic (X,Y,Z) coordinates in ly: 9.112, 22.12, 8.214
Proper motion: 0.348 arcsec/yr (35.2° from north)
Radial Velocity: -12.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -15.39, -4.889, -7.023

What do all these fields mean?


Spectral class: A0
Luminosity Class: V
Apparent visual magnitude: +0.03
Absolute visual magnitude: +0.58
Visual luminosity: 50.84 x Sol
Variable type: delta Scuti (pulsating variable)
Color indices: B-V= +0.00, U-B= -0.01, R-I= -0.09
Mass: 3.07 x Sol
Diameter: 3.151 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 7.130 A.U.s
Orbital period in CZ: 10.8658 years
Tidal index in CZ: 0.008470
Angular size of star in sky in CZ: 0.235599 degrees

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