Delta Capricorni

light-years
Proper names: Delta Capricorni, 49 Capricorni, Deneb Algiedi
Catalog numbers:
     Gliese (Gl) 837, Henry Draper (HD) 207098, Bonner Durchmusterung (BD) -16°5943, Hipparcos Input Catalog (HIC) 107556, Smithsonian Astrophysical Observatory (SAO) 164644, Fifth Fundamental Catalogue (FK5) 819, Hoffleit Bright Star (HR) 8322
Arity: singular
Right Ascension and Declination: 21h47m2.448s, -16°7'38.27" (epoch 2000.0)
Distance from Sol: 38.6 light-years (11.8 parsecs)
Standard error in distance: 1.0297%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 31.0, -20.3, -10.7
Galactic (X,Y,Z) coordinates in ly: 20.8, 16.4, -28.0
Proper motion: 0.394 arcsec/yr (138.5° from north)
Radial Velocity: -6.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -8.88, -19.1, -9.15

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: A6m
Luminosity Class: V
Apparent visual magnitude: +2.85 (increasing to +2.75)
Absolute visual magnitude: +2.49 (increasing to +2.39)
Visual luminosity: 8.82 x Sol (increasing to 9.67 x Sol)
Variable type: Algol (eclipsing binary)
Color indices: B-V= +0.29, U-B= +0.09, R-I= +0.16
Diameter: 2 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 2.97 A.U.s
Angular size of star in sky in CZ: 0.358998 degrees

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