Eggen/Greenstein white dwarf 372


Catalog numbers:
     Gliese & Jahreiss (GJ) 1221, Giclas (G) 240-72, Luyten Half-Second (LHS) 455, Eggen/Greenstein white dwarf (EG) 372, Luyten Palomar (LP) 44-113
Arity: singular
Right Ascension and Declination: 17h48m58s, +70°52'23" (epoch 1950.0)
Distance from Sol: 20.0 light-years (6.14 parsecs)
Standard error in distance: 1.2735%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -0.32, -6.56, 18.9
Galactic (X,Y,Z) coordinates in ly: -3.41, 16.9, 10.2
Proper motion: 1.651 arcsec/yr (311.0° from north)
Source for proper motion: Gliese

What do all these fields mean?

Spectral class: DXP9
Luminosity Class: wd
Apparent visual magnitude: +14.15
Absolute visual magnitude: +15.21
Visual luminosity: 0.000072 x Sol
Color indices: B-V= +0.40, U-B= -0.30
Diameter: 0.01 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.0085 A.U.s
Angular size of star in sky in CZ: 0.628890 degrees

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