Bonner Durchmusterung +0°3593

light-years

Catalog numbers:
     Gliese (Gl) 641, Henry Draper (HD) 152391, Bonner Durchmusterung (BD) +0°3593, Luyten Half-Second (LHS) 426, Hipparcos Input Catalog (HIC) 82588, Smithsonian Astrophysical Observatory (SAO) 121921
Age: 300 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 16h52m58.79s, +0°1'35.87" (epoch 2000.0)
Distance from Sol: 55.2 light-years (16.9 parsecs)
Standard error in distance: 1.4522%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -15.9, -52.9, 0.026
Galactic (X,Y,Z) coordinates in ly: 47.2, 16.0, 23.8
Proper motion: 1.658 arcsec/yr (205.8° from north)
Radial Velocity: 45.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 86.0, -111, 9.41

What do all these fields mean?


Spectral class: G8
Luminosity Class: V
Apparent visual magnitude: +6.63
Absolute visual magnitude: +5.49
Visual luminosity: 0.55 x Sol
Color indices: B-V= +0.76, U-B= +0.32, R-I= +0.24
Diameter: 0.87 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.74 A.U.s
Angular size of star in sky in CZ: 0.622715 degrees

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