Luyten 856-54

light-years

Catalog numbers:
     Gliese (Gl) 810, Luyten (L) 856-54
Arity: binary
Right Ascension and Declination: 20h52m48s, -14°13'12" (epoch 1950.0)
Distance from Sol: 41.3 light-years (12.7 parsecs)
Standard error in distance: 8.9965%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 27.4, -29.2, -10.2
Galactic (X,Y,Z) coordinates in ly: 28.6, 19.1, -23.0
Proper motion: 1.486 arcsec/yr (107.5° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined spectrum: M3.5 V-VI
Combined absolute visual magnitude: +11.79
Combined visual luminosity: 0.0017 x Sol
Observed Separation: 1381 A.U.s
As seen from A:
     B would appear as magnitude -1.83
As seen from B:
     A would appear as magnitude -3.93


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 501
Apparent visual magnitude: +12.45
Absolute visual magnitude: +11.94
Visual luminosity: 0.0015 x Sol
Color indices: B-V= +1.59, R-I= +1.26
Diameter: 0.3 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.038 A.U.s
Angular size of star in sky in CZ: 4.179128 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 500
Right Ascension and Declination: 20h52m47s, -14°15'0" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 27.4, -29.2, -10.2
Galactic (X,Y,Z) coordinates in ly: 28.6, 19.1, -23.0
Apparent visual magnitude: +14.55
Absolute visual magnitude: +14.04
Visual luminosity: 0.00021 x Sol
Color indices: B-V= +1.72, R-I= +1.42
Comfort Zone (visual): 0.015 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.