Cape Photographic Durchmusterung -53°9928

light-years

Catalog numbers:
     Gliese (Gl) 798, Henry Draper (HD) 196877, Cape Photographic Durchmusterung (CPD) -53°9928, Luyten Half-Second (LHS) 496, Hipparcos Input Catalog (HIC) 102186, UGPMF 501, Cordoba Durchmusterung (CD) -53°8617, Smethells (Sm) 63
Arity: singular
Right Ascension and Declination: 20h42m18.722s, -52°41'57.08" (epoch 2000.0)
Distance from Sol: 39.5 light-years (12.1 parsecs)
Standard error in distance: 1.4913%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 15.6, -18.2, -31.4
Galactic (X,Y,Z) coordinates in ly: 30.0, -7.53, -24.5
Proper motion: 1.069 arcsec/yr (176.4° from north)
Radial Velocity: -42.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -47.2, -51.4, 27.1

What do all these fields mean?


Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +8.83
Absolute visual magnitude: +8.41
Visual luminosity: 0.038 x Sol
Color indices: B-V= +1.31, U-B= +1.13, R-I= +0.61
Diameter: 0.67 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.19 A.U.s
Angular size of star in sky in CZ: 1.841406 degrees

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