12 Ophiuchi

light-years
Proper names: 12 Ophiuchi
Catalog numbers:
     Gliese (Gl) 631, Henry Draper (HD) 149661, Bonner Durchmusterung (BD) -1°3220, Luyten Half-Second (LHS) 3224, Hipparcos Input Catalog (HIC) 81300, Smithsonian Astrophysical Observatory (SAO) 141269, Fifth Fundamental Catalogue (FK5) 1433, Hoffleit Bright Star (HR) 6171
Heavy element abundance: 102% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 16h36m21.455s, -2°19'28.6" (epoch 2000.0)
Distance from Sol: 31.89 light-years (9.778 parsecs)
Standard error in distance: 0.8243%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -11.37, -29.77, -1.294
Galactic (X,Y,Z) coordinates in ly: 27.37, 6.840, 14.88
Proper motion: 0.552 arcsec/yr (124.6° from north)
Radial Velocity: -12.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 1.379, -0.469, -28.27

What do all these fields mean?


Spectral class: K0e
Luminosity Class: V
Apparent visual magnitude: +5.76
Absolute visual magnitude: +5.81
Visual luminosity: 0.412 x Sol
Color indices: B-V= +0.82, U-B= +0.42, R-I= +0.28
Diameter: 1.335 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.642 A.U.s
Angular size of star in sky in CZ: 1.108501 degrees

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