Zeta(2) Reticuli

light-years
Proper names: Zeta(2) Reticuli, Zeta Reticuli
Catalog numbers:
     Gliese (Gl) 138, Henry Draper (HD) 20807, Cape Photographic Durchmusterung (CPD) -62265 , Luyten Half-Second (LHS) 172 , Hipparcos Input Catalog (HIC) 15371, Smithsonian Astrophysical Observatory (SAO) 248774, Hoffleit Bright Star (HR) 1010, Luyten Two-Tenth (LTT) 1576
Age: 8700 million years
Source for age: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Heavy element abundance: 73% of Sol
Standard error in heavy element abundance: 21%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Points of interest:
     This star and Zeta(1) Reticuli may actually form a binary system.  If so, the two stars are at least 5500 A.U. apart in space, which would give them a very very long orbital period.
     B. Edvardsson et al. arrived at a metallicity of 55% of Sol for this star, based on their measured iron-to-hydrogen ratio of 59% of the Solar value.

Right Ascension and Declination: 3h18m12.81s, -62°30'23" (epoch 2000.0)
Distance from Sol: 39.40 light-years (12.08 parsecs)
Standard error in distance: 0.6361%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 11.80, 13.84, -34.95
Galactic (X,Y,Z) coordinates in ly: 4.025, -26.44, -28.93
Proper motion: 1.483 arcsec/yr (63.7° from north)
Radial Velocity: 11.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -70.05, -46.35, 16.94

What do all these fields mean?


Spectral class: G1
Luminosity Class: V
Apparent visual magnitude: +5.24
Absolute visual magnitude: +4.83
Visual luminosity: 1.020 x Sol
Color indices: B-V= +0.60
Mass: 1 x Sol
Diameter: 0.987 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.010 A.U.s
Orbital period in CZ: 1.01469 years
Tidal index in CZ: 0.971251
Angular size of star in sky in CZ: 0.520878 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 12-May-2001.