Eta Cephei

light-years
Proper names: Eta Cephei, 3 Cephei
Catalog numbers:
     Gliese (Gl) 807, Henry Draper (HD) 198149, Bonner Durchmusterung (BD) +61°2050, Luyten Half-Second (LHS) 3578, Hipparcos Input Catalog (HIC) 102422, Smithsonian Astrophysical Observatory (SAO) 19019, Fifth Fundamental Catalogue (FK5) 783, Hoffleit Bright Star (HR) 7957
Heavy element abundance: 103% of Sol
Standard error in heavy element abundance: 29%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 20h45m17.379s, +61°50'19.65" (epoch 2000.0)
Distance from Sol: 46.78 light-years (14.34 parsecs)
Standard error in distance: 0.6978%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 14.58, -16.58, 41.24
Galactic (X,Y,Z) coordinates in ly: -6.450, 45.35, 9.455
Proper motion: 0.826 arcsec/yr (6.3° from north)
Radial Velocity: -86.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -34.70, -96.75, 11.02

What do all these fields mean?


Spectral class: K0e
Luminosity Class: IV
Apparent visual magnitude: +3.43
Absolute visual magnitude: +2.65
Visual luminosity: 7.621 x Sol
Color indices: B-V= +0.92, U-B= +0.62, R-I= +0.33
Diameter: 3.977 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 2.761 A.U.s
Angular size of star in sky in CZ: 0.767929 degrees

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