Bonner Durchmusterung +68°883

light-years

Catalog numbers:
     Gliese (Gl) 637.1, Henry Draper (HD) 151541, Bonner Durchmusterung (BD) +68°883, Giclas (G) 240-25, Luyten Half-Second (LHS) 3238, Hipparcos Input Catalog (HIC) 81813, Smithsonian Astrophysical Observatory (SAO) 17200, Woolley (Wo) 9576
Age: 10600 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 16h42m38.485s, +68°6'7.97" (epoch 2000.0)
Distance from Sol: 79.3 light-years (24.3 parsecs)
Standard error in distance: 1.3663%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -9.79, -27.9, 73.5
Galactic (X,Y,Z) coordinates in ly: -10.6, 62.5, 47.6
Proper motion: 0.522 arcsec/yr (325.8° from north)
Radial Velocity: 10.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -57.0, -10.8, 18.9

What do all these fields mean?


Spectral class: K1
Luminosity Class: V
Apparent visual magnitude: +7.56
Absolute visual magnitude: +5.63
Visual luminosity: 0.49 x Sol
Color indices: B-V= +0.79, U-B= +0.36
Diameter: 0.85 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.70 A.U.s
Angular size of star in sky in CZ: 0.648356 degrees

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