Luyten 1142-88

light-years

Catalog numbers:
     Gliese (Gl) 784.2, Luyten (L) 1142-88
Arity: binary
Right Ascension and Declination: 20h11m32s, +6°32'30" (epoch 1950.0)
Distance from Sol: 73.5 light-years (22.5 parsecs)
Standard error in distance: 4.3103%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 39.6, -61.3, 8.37
Galactic (X,Y,Z) coordinates in ly: 46.8, 53.4, -19.0
Proper motion: 0.633 arcsec/yr (202.8° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +11.33
Combined visual luminosity: 0.0026 x Sol
Observed Separation: 2252 A.U.s
As seen from A:
     B would appear as magnitude -0.85
As seen from B:
     A would appear as magnitude -3.38


Component A:
Catalog numbers:
     Giclas (G) 24-10, Luyten Half-Second (LHS) 3533, Luyten Two-Tenth (LTT) 15922
Spectral class: M5
Luminosity Class: V
Apparent visual magnitude: +13.19
Absolute visual magnitude: +11.43
Visual luminosity: 0.0023 x Sol
Color indices: B-V= +1.54, U-B= +1.22, R-I= +1.20
Comfort Zone (visual): 0.048 A.U.s


Component B:
Catalog numbers:
     Giclas (G) 24-9, Luyten Half-Second (LHS) 3532, Eggen/Greenstein white dwarf (EG) 138, Luyten Two-Tenth (LTT) 15921
Right Ascension and Declination: 20h11m29s, +6°34'0" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 39.6, -61.3, 8.40
Galactic (X,Y,Z) coordinates in ly: 46.8, 53.4, -19.0
Proper motion: 0.633 arcsec/yr (202.8° from north)
Source for proper motion: Gliese
Spectral class: DA7
Luminosity Class: wd
Apparent visual magnitude: +15.72
Absolute visual magnitude: +13.96
Visual luminosity: 0.00023 x Sol
Color indices: B-V= +0.37, U-B= -0.40, R-I= +0.29
Diameter: 0.0196 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.015 A.U.s
Angular size of star in sky in CZ: 0.692702 degrees

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