Zeta Trianguli Australis

light-years
Proper names: Zeta Trianguli Australis
Catalog numbers:
     Gliese (Gl) 624, Henry Draper (HD) 147584, Cape Photographic Durchmusterung (CPD) -69°2558, Hipparcos Input Catalog (HIC) 80686, Smithsonian Astrophysical Observatory (SAO) 253554, Fifth Fundamental Catalogue (FK5) 610, Hoffleit Bright Star (HR) 6098
Heavy element abundance: 65% of Sol
Standard error in heavy element abundance: 9%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 16h28m28.123s, -70°5'3.98" (epoch 2000.0)
Distance from Sol: 39.48 light-years (12.11 parsecs)
Standard error in distance: 0.6853%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -5.230, -12.39, -37.12
Galactic (X,Y,Z) coordinates in ly: 29.11, -24.63, -10.21
Proper motion: 0.231 arcsec/yr (63.5° from north)
Radial Velocity: 7.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 12.54, 5.463, -6.811

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: G0
Luminosity Class: V
Apparent visual magnitude: +4.90
Absolute visual magnitude: +4.49
Visual luminosity: 1.399 x Sol
Color indices: B-V= +0.55, U-B= +0.04, R-I= +0.19
Diameter: 1.119 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.183 A.U.s
Angular size of star in sky in CZ: 0.504217 degrees

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