Bonner Durchmusterung +38°3896

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 1249, Henry Draper (HD) 190771, Bonner Durchmusterung (BD) +38°3896, Hipparcos Input Catalog (HIC) 98921, Smithsonian Astrophysical Observatory (SAO) 69377, Hoffleit Bright Star (HR) 7683, Luyten Two-Tenth (LTT) 15881, Woolley (Wo) 9685, Aitken Double Star (ADS) 13348
Arity: singular
Right Ascension and Declination: 20h5m9.89s, +38°28'42" (epoch 2000.0)
Distance from Sol: 61.6 light-years (18.9 parsecs)
Standard error in distance: 1.0273%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 25.0, -41.2, 38.3
Galactic (X,Y,Z) coordinates in ly: 15.7, 59.4, 3.67
Proper motion: 0.278 arcsec/yr (68.5° from north)
Radial Velocity: -22.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -25.1, -15.7, -15.8

What do all these fields mean?


Spectral class: G5
Luminosity Class: IV
Apparent visual magnitude: +6.20
Absolute visual magnitude: +4.82
Visual luminosity: 1.03 x Sol
Color indices: B-V= +0.65, U-B= +0.18
Diameter: 1.28 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.01 A.U.s
Angular size of star in sky in CZ: 0.672390 degrees

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