Catalogue Astrographique +18°1890-112

Catalog numbers:
Gliese (Gl) 589, Catalogue Astrographique (AC) +18°1890-112, Hipparcos Input Catalog (HIC) 76316
Arity: binary
Right Ascension and Declination: 15h35m19.31s, +17°42'44.8" (epoch 2000.0)
Distance from Sol: 46.5 light-years (14.2 parsecs)
Standard error in distance: 3.4388%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -26.1, -35.7, 14.1
Galactic (X,Y,Z) coordinates in ly: 26.1, 13.7, 35.9
Proper motion: 1.219 arcsec/yr (263.0° from north)
Radial Velocity: -43.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -55.0, -73.9, 12.4

What do all these fields mean?

Component A:
Catalog numbers:
Giclas (G) 137-26, Luyten Half-Second (LHS) 399
Spectral class: M4.5
Luminosity Class: V
Apparent visual magnitude: +12.41
Absolute visual magnitude: +11.64
Visual luminosity: 0.0019 x Sol
Color indices: B-V= +1.58, U-B= +1.18, R-I= +1.04
Diameter: 0.35 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.044 A.U.s
Angular size of star in sky in CZ: 4.258824 degrees

Component B:
Catalog numbers:
Giclas (G) 137-25, Luyten Half-Second (LHS) 400, Luyten (L) 1272-21
Spectral class: M6
Luminosity Class: V
Apparent visual magnitude: +14.99
Absolute visual magnitude: +14.22
Visual luminosity: 0.00018 x Sol
Color indices: B-V= +1.81, U-B= +1.79, R-I= +1.40
Diameter: 0.15 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.013 A.U.s
Angular size of star in sky in CZ: 5.988779 degrees

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