Catalogue Astrographique +793888

light-years

Catalog numbers:
     Gliese (Gl) 445, Giclas (G) 254-29, Luyten Half-Second (LHS) 2459, Hipparcos Input Catalog (HIC) 57544, Catalogue Astrographique (AC) +793888
Heavy element abundance: Galactic halo population (less than 10% of Sol)
Arity: singular
Right Ascension and Declination: 11h47m41.286s, +78°41'28.49" (epoch 2000.0)
Distance from Sol: 17.58 light-years (5.391 parsecs)
Standard error in distance: 0.7651%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -3.443, 0.185, 17.24
Galactic (X,Y,Z) coordinates in ly: -8.267, 11.06, 10.89
Proper motion: 0.863 arcsec/yr (55.5° from north)
Radial Velocity: -112.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 67.22, -54.71, -74.57

What do all these fields mean?


Spectral class: M3.5
Luminosity Class: V
Apparent visual magnitude: +10.80
Absolute visual magnitude: +12.14
Visual luminosity: 0.00121 x Sol
Color indices: B-V= +1.60, U-B= +1.08, R-I= +1.19
Mass: 0.15 x Sol
Diameter: 0.3 x Sol
Comfort Zone (visual): 0.0348 A.U.s
Orbital period in CZ: 6.11072 days
Tidal index in CZ: 3572.7
Angular size of star in sky in CZ: 4.601582 degrees

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