Cordoba Durchmusterung -31°17597

light-years

Catalog numbers:
     Gliese (Gl) 790, Henry Draper (HD) 194640, Cordoba Durchmusterung (CD) -31°17597, Luyten Half-Second (LHS) 3554, Hipparcos Input Catalog (HIC) 100925, Smithsonian Astrophysical Observatory (SAO) 212140
Arity: singular
Right Ascension and Declination: 20h27m44.249s, -30°52'4.37" (epoch 2000.0)
Distance from Sol: 63.3 light-years (19.4 parsecs)
Standard error in distance: 1.5673%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 32.7, -43.5, -32.5
Galactic (X,Y,Z) coordinates in ly: 51.4, 11.5, -35.1
Proper motion: 0.519 arcsec/yr (181.6° from north)
Radial Velocity: -1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 3.68, -46.9, -8.15

What do all these fields mean?


Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +6.61
Absolute visual magnitude: +5.17
Visual luminosity: 0.74 x Sol
Color indices: B-V= +0.73, U-B= +0.28, R-I= +0.24
Diameter: 0.9 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.86 A.U.s
Angular size of star in sky in CZ: 0.556251 degrees

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