Alpha Mensae

light-years
Proper names: Alpha Mensae
Catalog numbers:
     Gliese (Gl) 231, Henry Draper (HD) 43834, Cape Photographic Durchmusterung (CPD) -74°374, Hipparcos Input Catalog (HIC) 29271, Smithsonian Astrophysical Observatory (SAO) 256274, Fifth Fundamental Catalogue (FK5) 239, Hoffleit Bright Star (HR) 2261
Heavy element abundance: 102% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 6h10m14.436s, -74°45'11.05" (epoch 2000.0)
Distance from Sol: 33.10 light-years (10.15 parsecs)
Standard error in distance: 0.4546%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -0.389, 8.696, -31.93
Galactic (X,Y,Z) coordinates in ly: 7.878, -27.88, -16.00
Proper motion: 0.247 arcsec/yr (149.6° from north)
Radial Velocity: 34.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 18.84, -29.58, -11.37

What do all these fields mean?


Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +5.08
Absolute visual magnitude: +5.05
Visual luminosity: 0.833 x Sol
Color indices: B-V= +0.72, U-B= +0.33, R-I= +0.23
Mass: 0.87 x Sol
Diameter: 0.982 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.913 A.U.s
Orbital period in CZ: 341.514 days
Tidal index in CZ: 1.14383
Angular size of star in sky in CZ: 0.573281 degrees

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