Luyten 745-46

Catalog numbers:
Gliese (Gl) 283, Luyten (L) 745-46
Arity: binary
Right Ascension and Declination: 7h38m2s, -17°17'23" (epoch 1950.0)
Distance from Sol: 29.1 light-years (8.93 parsecs)
Standard error in distance: 4.2735%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -11.5, 25.3, -8.66
Galactic (X,Y,Z) coordinates in ly: -17.1, -23.5, 1.26
Proper motion: 1.252 arcsec/yr (116.6° from north)
Radial Velocity: 11 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 29.9, -33.8, 29.8

What do all these fields mean?

Component A:
Catalog numbers:
Luyten Half-Second (LHS) 235, Eggen/Greenstein white dwarf (EG) 54
Spectral class: DZQ6
Luminosity Class: wd
Apparent visual magnitude: +13.00
Absolute visual magnitude: +13.25
Visual luminosity: 0.00044 x Sol
Color indices: B-V= +0.24, U-B= -0.62, R-I= +0.04
Diameter: 0.0132 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: 0.336273 degrees

Component B:
Catalog numbers:
Luyten Half-Second (LHS) 234
Spectral class: M
Luminosity Class: V-VI
Apparent visual magnitude: +16.42
Absolute visual magnitude: +16.67
Visual luminosity: 0.000019 x Sol
Color indices: B-V= +1.83
Mass: 0.045 x Sol
Comfort Zone (visual): 0.0043 A.U.s
Orbital period in CZ: 11.7814 hours
Tidal index in CZ: 553621

Data for this star system were most recently updated on 4-April-2001.