Pi(3) Orionis

light-years
Proper names: Pi(3) Orionis, 1 Orionis, Pi Orionis
Catalog numbers:
     Gliese (Gl) 178, Henry Draper (HD) 30652, Bonner Durchmusterung (BD) +6°762, Hipparcos Input Catalog (HIC) 22449, Smithsonian Astrophysical Observatory (SAO) 112106, Fifth Fundamental Catalogue (FK5) 1134, Hoffleit Bright Star (HR) 1543, New Suspected Variable (NSV) 1731
Heavy element abundance: 105% of Sol
Standard error in heavy element abundance: 28%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 4h49m50.414s, +6°57'40.54" (epoch 2000.0)
Distance from Sol: 26.18 light-years (8.026 parsecs)
Standard error in distance: 0.7567%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 7.831, 24.78, 3.173
Galactic (X,Y,Z) coordinates in ly: -23.68, -4.939, -10.00
Proper motion: 0.464 arcsec/yr (88.1° from north)
Radial Velocity: 24.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -25.80, -14.83, 4.570

What do all these fields mean?


Spectral class: F6
Luminosity Class: V
Apparent visual magnitude: +3.19
Absolute visual magnitude: +3.66
Visual luminosity: 2.980 x Sol
Color indices: B-V= +0.45, U-B= -0.01, R-I= +0.16
Diameter: 1.725 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.726 A.U.s
Angular size of star in sky in CZ: 0.532772 degrees

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