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Gamma Cygni
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bayer objects
   
cygni, gamma
   
cygnus constellation
   
yellow-white supergiants
   
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  Epoch J2000
  Ra 20<sup>h</sup> 22<sup>m</sup> 137<sup>s</sup>
  Dec +40&deg 15&prime 24&Prime
  Appmag V 223


  Class F8 Ib
  B-v 0673
  U-b 053


  Radial V -75
  Prop Mo Ra 243
  Prop Mo Dec -093
  Parallax 243
  P Error 051
  Dist Ly 1,524
  Dist Pc 412


  Mass 12
  Radius
  Luminosity 65,000
  Temperature 6,500
  Metal
  Rotation 20 km/sec




Gamma Cygni (γ Cyg / γ Cygni) is a Star in the Constellation Cygnus . It also has the traditional name '''Sadr''' (also spelled '''Sadir''' or '''Sador''').

The traditional name comes from the Arabic word صدر ''şadr'', "chest", the same word which gave rise to the star Schedar ( Alpha Cassiopeiae ).

This star is surrounded by a diffuse nebula called
IC1318 , or the ''Gamma Cygni region''.


EXTERNAL LINKS

  • Sadr by Jim Kaler.