Alpha Serpentis

light-years
Proper names: Alpha Serpentis, 24 Serpentis
Catalog numbers:
     Gliese (Gl) 596.2, Henry Draper (HD) 140573, Bonner Durchmusterung (BD) +6°3088, Hipparcos Input Catalog (HIC) 77070, Smithsonian Astrophysical Observatory (SAO) 121157, Fifth Fundamental Catalogue (FK5) 582, Hoffleit Bright Star (HR) 5854, Woolley (Wo) 9528
Heavy element abundance: 153% of Sol
Standard error in heavy element abundance: 13%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 15h44m16.087s, +6°25'32.31" (epoch 2000.0)
Distance from Sol: 73.2 light-years (22.5 parsecs)
Standard error in distance: 1.5691%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -40.6, -60.4, 8.20
Galactic (X,Y,Z) coordinates in ly: 51.5, 13.3, 50.4
Proper motion: 0.142 arcsec/yr (72.0° from north)
Radial Velocity: 2.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 5.46, 13.4, -5.18

What do all these fields mean?


Spectral class: K2
Luminosity Class: III
Apparent visual magnitude: +2.60
Absolute visual magnitude: +0.84
Visual luminosity: 40.0 x Sol
Color indices: B-V= +1.17, U-B= +1.24, R-I= +0.38
Diameter: 12.5 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 6.33 A.U.s
Angular size of star in sky in CZ: 1.052964 degrees

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