Lambda Aurigae

light-years
Proper names: Lambda Aurigae, 15 Aurigae
Catalog numbers:
     Gliese (Gl) 197, Henry Draper (HD) 34411, Bonner Durchmusterung (BD) +39°1248, Luyten Half-Second (LHS) 1753, Hipparcos Input Catalog (HIC) 24813, Smithsonian Astrophysical Observatory (SAO) 40233, Fifth Fundamental Catalogue (FK5) 1145, Hoffleit Bright Star (HR) 1729
Age: 7100 million years
Source for age: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Heavy element abundance: 160% of Sol
Standard error in heavy element abundance: 11%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Points of interest:
     B. Edvardsson et al. calculated a heavy element abundance of 102% of Sol for this star, based on their measurement of an iron-to-hydrogen ratio of 93% of the Solar value.

Right Ascension and Declination: 5h19m8.47s, +40°5'56.61" (epoch 2000.0)
Distance from Sol: 41.2 light-years (12.6 parsecs)
Standard error in distance: 1.1253%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 5.59, 31.0, 26.6
Galactic (X,Y,Z) coordinates in ly: -40.3, 8.55, 1.52
Proper motion: 0.844 arcsec/yr (141.6° from north)
Radial Velocity: 66.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -75.4, -35.6, 5.61

What do all these fields mean?


Spectral class: G2
Luminosity Class: IV-V
Apparent visual magnitude: +4.71
Absolute visual magnitude: +4.20
Visual luminosity: 1.83 x Sol
Color indices: B-V= +0.63, U-B= +0.12, R-I= +0.20
Diameter: 1.90 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.35 A.U.s
Angular size of star in sky in CZ: 0.750662 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 11-May-2001.