23 Ursae Majoris

light-years
Proper names: 23 Ursae Majoris
Catalog numbers:
     Henry Draper (HD) 81937, Bonner Durchmusterung (BD) +63°845, Hipparcos Input Catalog (HIC) 46733, Smithsonian Astrophysical Observatory (SAO) 14908, Fifth Fundamental Catalogue (FK5) 355, Hoffleit Bright Star (HR) 3757, New Suspected Variable (NSV) 4506
Arity: singular
Right Ascension and Declination: 9h31m31.716s, +63°3'42.7" (epoch 2000.0)
Distance from Sol: 75.5 light-years (23.1 parsecs)
Standard error in distance: 1.4599%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -27.3, 20.6, 67.3
Galactic (X,Y,Z) coordinates in ly: -48.7, 27.4, 50.7
Proper motion: 0.111 arcsec/yr (76.8° from north)
Radial Velocity: -10.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 16.0, -0.45, 0.15

What do all these fields mean?


Spectral class: F0
Luminosity Class: IV
Apparent visual magnitude: +3.70
Absolute visual magnitude: +1.88
Visual luminosity: 15.5 x Sol
Color indices: B-V= +0.33, U-B= +0.10, R-I= +0.18
Diameter: 2.64 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 3.93 A.U.s
Angular size of star in sky in CZ: 0.357602 degrees

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