HN Pegasi

light-years
Proper names: HN Pegasi
Catalog numbers:
     Gliese (Gl) 836.7, Henry Draper (HD) 206860, Bonner Durchmusterung (BD) +14°4668, Hipparcos Input Catalog (HIC) 107350, Smithsonian Astrophysical Observatory (SAO) 107364, FK4 Supplement (FK4 Sup) 3737, Hoffleit Bright Star (HR) 8314, Woolley (Wo) 9751
Age: 90 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 21h44m31.336s, +14°46'18.8" (epoch 2000.0)
Distance from Sol: 60.0 light-years (18.4 parsecs)
Standard error in distance: 1.5393%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 48.2, -32.3, 15.3
Galactic (X,Y,Z) coordinates in ly: 17.6, 49.7, -28.7
Proper motion: 0.261 arcsec/yr (116.5° from north)
Radial Velocity: -17 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -14.6, -21.7, -11.0

What do all these fields mean?


Spectral class: G0
Luminosity Class: V
Apparent visual magnitude: +5.95
Absolute visual magnitude: +4.62
Visual luminosity: 1.23 x Sol
Variable type: BY Draconis (rotating variable)
Color indices: B-V= +0.59, U-B= +0.04
Diameter: 0.94 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.11 A.U.s
Angular size of star in sky in CZ: 0.451131 degrees

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