Theta Draconis

light-years
Proper names: Theta Draconis, 13 Draconis
Catalog numbers:
     Gliese (Gl) 609.1, Henry Draper (HD) 144284, Bonner Durchmusterung (BD) +58°1608, Hipparcos Input Catalog (HIC) 78527, Smithsonian Astrophysical Observatory (SAO) 29765, Fifth Fundamental Catalogue (FK5) 598, Hoffleit Bright Star (HR) 5986, Woolley (Wo) 9538
Heavy element abundance: 170% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 16h1m53.335s, +58°33'54.96" (epoch 2000.0)
Distance from Sol: 68.2 light-years (20.9 parsecs)
Standard error in distance: 1.1173%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -17.5, -31.0, 58.2
Galactic (X,Y,Z) coordinates in ly: 0.052, 48.7, 47.9
Proper motion: 0.467 arcsec/yr (316.0° from north)
Radial Velocity: -7.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -42.9, -17.7, 7.09

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: F8
Luminosity Class: IV-V
Apparent visual magnitude: +4.00
Absolute visual magnitude: +2.40
Visual luminosity: 9.54 x Sol
Color indices: B-V= +0.52, U-B= +0.10
Diameter: 4.23 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 3.09 A.U.s
Angular size of star in sky in CZ: 0.729889 degrees

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