Bonner Durchmusterung +25°3020

light-years

Catalog numbers:
     Gliese (Gl) 609.2, Henry Draper (HD) 144287, Bonner Durchmusterung (BD) +25°3020, Luyten Half-Second (LHS) 3148, Hipparcos Input Catalog (HIC) 78709, Smithsonian Astrophysical Observatory (SAO) 84179, AGK3 Reference (AGK3R) 14337, Woolley (Wo) 9542
Age: 11100 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 16h4m3.692s, +25°15'17.27" (epoch 2000.0)
Distance from Sol: 70.1 light-years (21.5 parsecs)
Standard error in distance: 1.8757%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -30.7, -55.4, 29.9
Galactic (X,Y,Z) coordinates in ly: 36.0, 32.1, 50.8
Proper motion: 0.867 arcsec/yr (322.2° from north)
Radial Velocity: -48.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -98.6, -14.9, 12.8

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: G8
Luminosity Class: V
Apparent visual magnitude: +7.10
Absolute visual magnitude: +5.44
Visual luminosity: 0.58 x Sol
Color indices: B-V= +0.77, U-B= +0.33, R-I= +0.28
Diameter: 0.87 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.76 A.U.s
Angular size of star in sky in CZ: 0.608914 degrees

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