Luyten's Star

light-years
Proper names: Luyten's Star
Catalog numbers:
     Gliese (Gl) 273, Bonner Durchmusterung (BD) +51668, Giclas (G) 89-19, Luyten Half-Second (LHS) 33, Hipparcos Input Catalog (HIC) 36208, Vyssotsky McCormick (McC) 17
Arity: singular
Right Ascension and Declination: 7h27m24.5s, +5°13'32.5" (epoch 2000.0)
Distance from Sol: 12.39 light-years (3.799 parsecs)
Standard error in distance: 0.5403%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -4.592, 11.45, 1.128
Galactic (X,Y,Z) coordinates in ly: -10.23, -6.580, 2.346
Proper motion: 3.761 arcsec/yr (171.2° from north)
Radial Velocity: 18.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 16.42, -65.95, -17.25

What do all these fields mean?


Spectral class: M3.5n
Luminosity Class: V
Apparent visual magnitude: +9.84
Absolute visual magnitude: +11.94
Visual luminosity: 0.00145 x Sol
Color indices: B-V= +1.56, U-B= +1.16, R-I= +1.21
Mass: 0.16 x Sol
Diameter: 0.38 x Sol
Comfort Zone (visual): 0.0381 A.U.s
Orbital period in CZ: 6.80063 days
Tidal index in CZ: 2884.58
Angular size of star in sky in CZ: 5.311967 degrees

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