Eltanin

(el-TAY-nin)

Gamma Draconis

Eltanin

Distance (Light Years) 147.6 ± 3.1
Apparent Magnitude 2.24
Color (B-V)1.52

Names For This Star

This star is also known as Etamin, Etanin, Ettanin, Rastaban, Rasaben, or the Zenith Star.

The names of this star derive from the Arabic name Al Ras al Tinnin meaning "The Dragon's Head."

The name "Zenith Star" derives from the fact that star moves through the zenith at the latitude of the Royal Observatory in Greenwich, England.

Description of the Star

Eltanin is a cool, orange K5III giant about 200 times as luminous as the sun. The spectral type implies an effective temperature of about 3800 K, a mass of 5.0 solar masses and a diameter 25 times that of the sun.

Eltanin is a variable star fluctuating by about 0.08 magnitudes in brightness.

Other Designations For This Star


Flamsteed

33 Draconis

Hipparcos Identifier (HIP Number)

87833

Harvard Revised (HR Number)

6705

Henry Draper Catalog (HD Number)

164058

Bonner Durchmusterung (BD Number)

BD+51 2282
Smithsonian Astrophysical
Observatory compendium (SAO Number)
30653

Fundamental Katalog (FK5 Number)

676
 

 


Copyright © 1998 - 2010 by Arnold V. Lesikar,
Professor Emeritus
Dept. of Physics, Astronomy, and Engineering Science,
St. Cloud State University,St. Cloud, MN 56301-4498

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