Bonner Durchmusterung +41°3799

light-years

Catalog numbers:
     Gliese (Gl) 793.1, Henry Draper (HD) 195987, Bonner Durchmusterung (BD) +41°3799, Giclas (G) 209-35, Hipparcos Input Catalog (HIC) 101382, Smithsonian Astrophysical Observatory (SAO) 49769, Woolley (Wo) 9699
Arity: singular
Right Ascension and Declination: 20h32m51.61s, +41°53'54.7" (epoch 2000.0)
Distance from Sol: 72.5 light-years (22.2 parsecs)
Standard error in distance: 1.4026%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 33.4, -42.4, 48.4
Galactic (X,Y,Z) coordinates in ly: 11.3, 71.6, 1.31
Proper motion: 0.486 arcsec/yr (340.6° 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: -29.0, -2.35, 42.6

What do all these fields mean?


NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: G9
Luminosity Class: V
Apparent visual magnitude: +7.08
Absolute visual magnitude: +5.35
Visual luminosity: 0.63 x Sol
Color indices: B-V= +0.79, U-B= +0.38, R-I= +0.31
Diameter: 0.88 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.80 A.U.s
Angular size of star in sky in CZ: 0.589958 degrees

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