82 Eridani

light-years
Proper names: 82 Eridani
Catalog numbers:
     Gliese (Gl) 139, Henry Draper (HD) 20794, Cordoba Durchmusterung (CD) -43°1028 , Luyten Half-Second (LHS) 19 , Hipparcos Input Catalog (HIC) 15510, Smithsonian Astrophysical Observatory (SAO) 216263, Fifth Fundamental Catalogue (FK5) 119, Hoffleit Bright Star (HR) 1008, Luyten Two-Tenth (LTT) 1583
Heavy element abundance: 48% of Sol
Standard error in heavy element abundance: 27%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 3h19m55.669s, -43°4'11.29" (epoch 2000.0)
Distance from Sol: 19.77 light-years (6.060 parsecs)
Standard error in distance: 0.3322%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 9.285, 11.06, -13.50
Galactic (X,Y,Z) coordinates in ly: -3.748, -10.45, -16.35
Proper motion: 3.127 arcsec/yr (76.3° from north)
Radial Velocity: 86.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -78.78, -92.90, -27.35

What do all these fields mean?


NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +4.26
Absolute visual magnitude: +5.35
Visual luminosity: 0.632 x Sol
Color indices: B-V= +0.71
Mass: 0.89 x Sol
Diameter: 0.912 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.795 A.U.s
Orbital period in CZ: 274.525 days
Tidal index in CZ: 1.77017
Angular size of star in sky in CZ: 0.611302 degrees

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