Luyten 489-58

light-years

Catalog numbers:
     Gliese (Gl) 732, Luyten Half-Second (LHS) 469, Luyten (L) 489-58
Arity: binary
Right Ascension and Declination: 18h50m15s, -38°39'48" (epoch 1950.0)
Distance from Sol: 43 light-years (13 parsecs)
Standard error in distance: 13.8603%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 7.4, -33, -27
Galactic (X,Y,Z) coordinates in ly: 41, -1.7, -13
Proper motion: 1.011 arcsec/yr (161.1° 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: +12.03
Combined visual luminosity: 0.001 x Sol
Observed Separation: 160 A.U.s
As seen from A:
     B would appear as magnitude -5.18
As seen from B:
     A would appear as magnitude -8.48


Component A:
Spectral class: G0
Luminosity Class: VI
Apparent visual magnitude: +12.70
Absolute visual magnitude: +12.08
Visual luminosity: 0.001 x Sol
Color indices: B-V= +1.53, U-B= +1.12, R-I= +1.23
Comfort Zone (visual): 0.04 A.U.s


Component B:
Spectral class: M
Luminosity Class: VI
Apparent visual magnitude: +16.00
Absolute visual magnitude: +15.38
Visual luminosity: 0.00006 x Sol
Diameter: 0.14 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.008 A.U.s
Angular size of star in sky in CZ: 9.533809 degrees

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