EQ Virginis

light-years
Proper names: EQ Virginis
Catalog numbers:
     Gliese (Gl) 517, Henry Draper (HD) 118100, Bonner Durchmusterung (BD) -7°3646, Hipparcos Input Catalog (HIC) 66252, Smithsonian Astrophysical Observatory (SAO) 139419, Vyssotsky McCormick (McC) 145
Heavy element abundance: 85% of Sol
Standard error in heavy element abundance: 17%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 13h34m43.257s, -8°20'31.85" (epoch 2000.0)
Distance from Sol: 64.5 light-years (19.8 parsecs)
Standard error in distance: 1.9212%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -58.5, -25.6, -9.36
Galactic (X,Y,Z) coordinates in ly: 30.8, -24.2, 51.3
Proper motion: 0.293 arcsec/yr (250.5° from north)
Radial Velocity: -24 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -27.6, -13.2, -19.8

What do all these fields mean?


Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +11.90 (increasing to +8.60)
Absolute visual magnitude: +10.42 (increasing to +7.12)
Visual luminosity: 0.0059 x Sol (increasing to 0.12 x Sol)
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +1.21, U-B= +1.04, R-I= +0.54
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.077 A.U.s
Angular size of star in sky in CZ: 4.709952 degrees

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