Luyten 989-20

Catalog numbers:
Gliese (Gl) 660, Giclas (G) 19-15, Luyten Half-Second (LHS) 3269, Hipparcos Input Catalog (HIC) 84123, Luyten (L) 989-20
Arity: binary
Right Ascension and Declination: 17h11m52.335s, -1°51'6.49" (epoch 2000.0)
Distance from Sol: 35.2 light-years (10.8 parsecs)
Standard error in distance: 5.2308%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -7.34, -34.4, -1.14
Galactic (X,Y,Z) coordinates in ly: 31.1, 11.0, 12.3
Proper motion: 0.549 arcsec/yr (234.7° 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
Combined absolute visual magnitude: +11.20
Combined visual luminosity: 0.0029 x Sol
Period: 33.5 years
Observed Separation: 7.45 A.U.s
Source for orbit data: Heintz AJ 101, 1071
As seen from A:
B would appear as magnitude -15.18
As seen from B:
A would appear as magnitude -15.33

Component A:
Apparent visual magnitude: +12.05
Absolute visual magnitude: +11.88
Visual luminosity: 0.0015 x Sol
Comfort Zone (visual): 0.039 A.U.s

Component B:
Apparent visual magnitude: +12.20
Absolute visual magnitude: +12.03
Visual luminosity: 0.0013 x Sol
Comfort Zone (visual): 0.037 A.U.s

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