AD Leonis

Proper names: AD Leonis
Catalog numbers:
     Gliese (Gl) 388, Bonner Durchmusterung (BD) +202465, Luyten Half-Second (LHS) 5167, Vyssotsky McCormick (McC) 574
Arity: singular (an unseen companion is suspected)
Right Ascension and Declination: 10h16m54s, +20°7'17" (epoch 1950.0)
Distance from Sol: 16.0 light-years (4.90 parsecs)
Standard error in distance: 1.3546%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -13.5, 6.53, 5.50
Galactic (X,Y,Z) coordinates in ly: -7.45, -5.51, 13.0
Proper motion: 0.506 arcsec/yr (264.0° from north)
Radial Velocity: 12.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -14.8, -7.60, 3.39

What do all these fields mean?

Spectral class: M3e
Luminosity Class: V
Apparent visual magnitude: +9.40 (increasing to +9.00)
Absolute visual magnitude: +10.95 (increasing to +10.55)
Visual luminosity: 0.0036 x Sol (increasing to 0.0053 x Sol)
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +1.54, U-B= +1.08, R-I= +1.13
Mass: 0.2 x Sol
Diameter: 0.42 x Sol
Comfort Zone (visual): 0.060 A.U.s
Orbital period in CZ: 12.102 days
Tidal index in CZ: 910.888
Angular size of star in sky in CZ: 3.711464 degrees

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