40 Leonis

light-years
Proper names: 40 Leonis
Catalog numbers:
     Gliese (Gl) 388.1, Henry Draper (HD) 89449, Bonner Durchmusterung (BD) +20°2466, Hipparcos Input Catalog (HIC) 50564, Smithsonian Astrophysical Observatory (SAO) 99065, Hoffleit Bright Star (HR) 4054, New Suspected Variable (NSV) 4822
Heavy element abundance: 95% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 10h19m44.142s, +19°28'15.07" (epoch 2000.0)
Distance from Sol: 69.0 light-years (21.2 parsecs)
Standard error in distance: 1.7062%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -59.0, 27.6, 23.0
Galactic (X,Y,Z) coordinates in ly: -31.2, -24.3, 56.6
Proper motion: 0.328 arcsec/yr (226.7° from north)
Radial Velocity: 6.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -14.4, -27.6, -12.4

What do all these fields mean?


Spectral class: F6
Luminosity Class: IV
Apparent visual magnitude: +4.79
Absolute visual magnitude: +3.17
Visual luminosity: 4.72 x Sol
Color indices: B-V= +0.45, U-B= +0.01
Diameter: 2.73 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 2.17 A.U.s
Angular size of star in sky in CZ: 0.670020 degrees

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