Bonner Durchmusterung +4°4157

light-years

Catalog numbers:
     Gliese (Gl) 763, Henry Draper (HD) 184489, Bonner Durchmusterung (BD) +4°4157, Luyten Half-Second (LHS) 3470, Hipparcos Input Catalog (HIC) 96285, Smithsonian Astrophysical Observatory (SAO) 124806, Vyssotsky McCormick (McC) 196
Arity: singular
Right Ascension and Declination: 19h34m39.834s, +4°34'56.68" (epoch 2000.0)
Distance from Sol: 47.2 light-years (14.5 parsecs)
Standard error in distance: 2.3325%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 18.9, -43.1, 3.77
Galactic (X,Y,Z) coordinates in ly: 34.5, 31.5, -6.53
Proper motion: 0.605 arcsec/yr (59.9° from north)
Radial Velocity: -57.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -68.1, -14.2, -13.5

What do all these fields mean?


Spectral class: M0.5
Luminosity Class: V
Apparent visual magnitude: +9.35
Absolute visual magnitude: +8.55
Visual luminosity: 0.033 x Sol
Color indices: B-V= +1.39, U-B= +1.23, R-I= +0.61
Diameter: 0.65 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.18 A.U.s
Angular size of star in sky in CZ: 1.901003 degrees

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