Eggen/Greenstein white dwarf 200

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 2139, Giclas (G) 155-34, Eggen/Greenstein white dwarf (EG) 200, Luyten Two-Tenth (LTT) 7421
Arity: singular
Right Ascension and Declination: 18h40m12s, -11°11'41" (epoch 1950.0)
Distance from Sol: 62 light-years (19 parsecs)
Standard error in distance: 10.1695%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 11, -59, -12
Galactic (X,Y,Z) coordinates in ly: 57, 23, -3.4
Proper motion: 0.354 arcsec/yr (224.0° from north)
Radial Velocity: 53 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 61, -8.1, 6.1

What do all these fields mean?


Spectral class: DA5
Luminosity Class: wd
Apparent visual magnitude: +14.18
Absolute visual magnitude: +12.80
Visual luminosity: 0.0007 x Sol
Color indices: B-V= +0.15, U-B= -0.61
Comfort Zone (visual): 0.03 A.U.s

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