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Information About

Gamma Draconis




name=Gamma Draconis }}
  Epoch J2000
  Ra 17<sup>h</sup> 56<sup>m</sup> 364<sup>s</sup>
  Dec +51&deg 29&prime 203&Prime
  Appmag V 224


  Class K5 III
  B-v 152
  U-b 187


  Radial V -28
  Prop Mo Ra -852
  Prop Mo Dec -2305
  Parallax 2210
  P Error 046
  Dist Ly 148
  Dist Pc 453


  Mass 17
  Radius 50
  Luminosity 600
  Temperature 4,000
  Metal
  Rotation <17 km/sec





Gamma Draconis (γ Dra / γ Draconis) is a Star in the Constellation Draco . It also has the traditional name '''Eltanin''', also '''Etamin'''.

It is an orange giant of Spectral Type K5. Despite its Bayer Designation of "gamma", it is actually the brightest star in Draco, outshining Rastaban ( Beta Draconis ) by nearly half a magnitude. In fact, the name Rastaban (also '''Rasaben''') was formerly used for Eltanin, and the two terms share an Arabic root meaning "serpent" or "dragon." Because of its proximity to the Point Directly Overhead London, it has also been called '''Zenith Star'''.

In 1728 , while unsuccessfully attempting to measure the Parallax of this star, James Bradley discovered the Aberration Of Light resulting from the movement of the Earth.


GAMMA DRACONIS IN FICTION



Gamma Draconis is a star system used in the Freespace 2 game.

Gamma Draconis is the Elerian home-system in the PC strategy game Master Of Orion II


REFERENCES

Kaler, Jim (2004). "STARS: Eltanin" . Retrieved July 11, 2005.