Bonner Durchmusterung +22°3908

light-years

Catalog numbers:
     Gliese (Gl) 778, Henry Draper (HD) 190404, Bonner Durchmusterung (BD) +22°3908, Giclas (G) 186-11, Luyten Half-Second (LHS) 481, Hipparcos Input Catalog (HIC) 98792, Smithsonian Astrophysical Observatory (SAO) 88138, AGK3 Reference (AGK3R) 17917, New Suspected Variable (NSV) 12756
Heavy element abundance: 67% of Sol
Standard error in heavy element abundance: 7%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 20h3m52.098s, +23°20'26.84" (epoch 2000.0)
Distance from Sol: 50.8 light-years (15.6 parsecs)
Standard error in distance: 1.3073%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 24.0, -40.0, 20.1
Galactic (X,Y,Z) coordinates in ly: 23.6, 44.8, -4.03
Proper motion: 1.353 arcsec/yr (228.3° from north)
Radial Velocity: -1.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 85.3, -44.4, 27.3

What do all these fields mean?


Spectral class: K1
Luminosity Class: V
Apparent visual magnitude: +7.28
Absolute visual magnitude: +6.32
Visual luminosity: 0.26 x Sol
Color indices: B-V= +0.82, U-B= +0.40, R-I= +0.31
Diameter: 0.86 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.51 A.U.s
Angular size of star in sky in CZ: 0.901701 degrees

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