Lambda Arae

light-years
Proper names: Lambda Arae
Catalog numbers:
     Gliese (Gl) 686.2, Henry Draper (HD) 160032, Cordoba Durchmusterung (CD) -49°11616, Hipparcos Input Catalog (HIC) 86486, Smithsonian Astrophysical Observatory (SAO) 228257, Hoffleit Bright Star (HR) 6569, Woolley (Wo) 9597
Age: 2100 million years
Source for age: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Heavy element abundance: 56% of Sol
Source for heavy element abundance: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Arity: singular
Right Ascension and Declination: 17h40m23.875s, -49°24'56.08" (epoch 2000.0)
Distance from Sol: 71.3 light-years (21.9 parsecs)
Standard error in distance: 1.6986%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -3.96, -46.2, -54.2
Galactic (X,Y,Z) coordinates in ly: 66.8, -21.5, -12.8
Proper motion: 0.209 arcsec/yr (148.2° from north)
Radial Velocity: 3.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -2.90, -9.68, -19.5

What do all these fields mean?


Spectral class: F2
Luminosity Class: V
Apparent visual magnitude: +4.76
Absolute visual magnitude: +3.06
Visual luminosity: 5.20 x Sol
Color indices: B-V= +0.40, U-B= -0.04, R-I= +0.25
Diameter: 1.2 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 2.28 A.U.s
Angular size of star in sky in CZ: 0.280600 degrees

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