Eggen/Greenstein white dwarf 199

light-years

Catalog numbers:
     Gliese (Gl) 699.1, Giclas (G) 259-21, Luyten Half-Second (LHS) 56, Eggen/Greenstein white dwarf (EG) 199, Luyten Palomar (LP) 9-231
Arity: singular
Right Ascension and Declination: 17h56m40s, +82°44'6" (epoch 1950.0)
Distance from Sol: 53.0 light-years (16.3 parsecs)
Standard error in distance: 4.9459%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -0.098, -6.71, 52.6
Galactic (X,Y,Z) coordinates in ly: -19.6, 42.1, 25.6
Proper motion: 3.587 arcsec/yr (337.3° from north)
Radial Velocity: -154 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -174, -264, -18.0

What do all these fields mean?


Spectral class: DA7
Luminosity Class: wd
Apparent visual magnitude: +14.30
Absolute visual magnitude: +13.24
Visual luminosity: 0.00044 x Sol
Color indices: B-V= +0.35, U-B= -0.52
Diameter: 0.0147 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.021 A.U.s
Angular size of star in sky in CZ: 0.374190 degrees

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