50 Persei

light-years
Proper names: 50 Persei
Catalog numbers:
     Gliese (Gl) 161.1, Henry Draper (HD) 25998, Bonner Durchmusterung (BD) +37°882, Hipparcos Input Catalog (HIC) 19335, Smithsonian Astrophysical Observatory (SAO) 57006, FK5 Extension (FK5 Ext) 2297, Hoffleit Bright Star (HR) 1278, Woolley (Wo) 9145
Arity: singular
Right Ascension and Declination: 4h8m36.623s, +38°2'23" (epoch 2000.0)
Distance from Sol: 69.6 light-years (21.3 parsecs)
Standard error in distance: 1.6163%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 25.6, 48.5, 42.9
Galactic (X,Y,Z) coordinates in ly: -64.7, 22.7, -11.6
Proper motion: 0.261 arcsec/yr (139.9° from north)
Radial Velocity: 26.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -32.6, -16.4, -7.26

What do all these fields mean?


Spectral class: F7
Luminosity Class: V
Apparent visual magnitude: +5.52
Absolute visual magnitude: +3.87
Visual luminosity: 2.47 x Sol
Color indices: B-V= +0.46, U-B= -0.03
Diameter: 1.07 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.57 A.U.s
Angular size of star in sky in CZ: 0.363318 degrees

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