Lambda Serpentis

light-years
Proper names: Lambda Serpentis, 27 Serpentis
Catalog numbers:
     Gliese (Gl) 598, Henry Draper (HD) 141004, Bonner Durchmusterung (BD) +7°3023, Hipparcos Input Catalog (HIC) 77257, Smithsonian Astrophysical Observatory (SAO) 121186, Hoffleit Bright Star (HR) 5868, New Suspected Variable (NSV) 7246
Age: 7322 million years
Standard error in age: 1%
Source for age: Avg. of Barry and Edvardsson
Heavy element abundance: 106% of Sol
Standard error in heavy element abundance: 6%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 15h46m26.608s, +7°21'10.72" (epoch 2000.0)
Distance from Sol: 38.34 light-years (11.75 parsecs)
Standard error in distance: 0.9315%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -20.92, -31.75, 4.906
Galactic (X,Y,Z) coordinates in ly: 26.74, 7.642, 26.39
Proper motion: 0.241 arcsec/yr (250.9° from north)
Radial Velocity: -68.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -50.62, -25.21, -40.93

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: +4.42
Absolute visual magnitude: +4.07
Visual luminosity: 2.049 x Sol
Color indices: B-V= +0.60, U-B= +0.11, R-I= +0.20
Mass: 1.2 x Sol
Diameter: 1.390 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.431 A.U.s
Orbital period in CZ: 1.56343 years
Tidal index in CZ: 0.40911
Angular size of star in sky in CZ: 0.517497 degrees

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