Bonner Durchmusterung -3°3508

light-years

Catalog numbers:
     Gliese (Gl) 521.1, Henry Draper (HD) 118926, Bonner Durchmusterung (BD) -3°3508, Luyten Half-Second (LHS) 2773, Hipparcos Input Catalog (HIC) 66675, Smithsonian Astrophysical Observatory (SAO) 139476, Vyssotsky McCormick (McC) 146, Woolley (Wo) 9456
Arity: possible spectroscopic binary
Right Ascension and Declination: 13h40m7.127s, -4°11'9.16" (epoch 2000.0)
Distance from Sol: 47.4 light-years (14.5 parsecs)
Standard error in distance: 2.0362%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -42.8, -20.0, -3.46
Galactic (X,Y,Z) coordinates in ly: 22.0, -14.7, 39.3
Proper motion: 0.627 arcsec/yr (322.2° from north)
Radial Velocity: 5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -33.3, 6.84, 27.2

What do all these fields mean?


Spectral class: K7
Apparent visual magnitude: +9.61
Absolute visual magnitude: +8.79
Visual luminosity: 0.026 x Sol
Color indices: B-V= +1.40, U-B= +1.20, R-I= +0.65
Diameter: 0.63 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.16 A.U.s
Angular size of star in sky in CZ: 2.066260 degrees

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