Catalogue Astrographique +73°8031

light-years

Catalog numbers:
     Gliese (Gl) 828.5, Giclas (G) 261-43, Eggen/Greenstein white dwarf (EG) 144, Catalogue Astrographique (AC) +73°8031, Luyten Two-Tenth (LTT) 18524
Arity: singular
Right Ascension and Declination: 21h26m43s, +73°25'53" (epoch 1950.0)
Distance from Sol: 66.8 light-years (20.5 parsecs)
Standard error in distance: 4.3137%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 15.0, -11.8, 64.1
Galactic (X,Y,Z) coordinates in ly: -21.7, 60.4, 18.7
Proper motion: 0.3 arcsec/yr (170.0° from north)
Radial Velocity: 8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 11.1, 19.2, -20.5

What do all these fields mean?


Spectral class: DA4
Luminosity Class: wd
Apparent visual magnitude: +12.80
Absolute visual magnitude: +11.24
Visual luminosity: 0.0028 x Sol
Color indices: B-V= +0.02, U-B= -0.66
Diameter: 0.0153 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.053 A.U.s
Angular size of star in sky in CZ: 0.154879 degrees

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