Eta Aquilae Article Index for
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Eta Aquilae
  CATEGORIES ABOUT ETA AQUILAE
   
aquila constellation
   
bayer objects
   
aquilae, eta
   
cepheid variables
   
yellow-white supergiants
   
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  Epoch J20000
  Constell Aquila
  Ra 19<sup>h</sup> 52<sup>m</sup> 284<sup>s</sup>
  Dec +1&deg 00' 20"
  Spectral F6Ib
  Appmag V +387
  Dist Ly 1180 &plusmn 390
  Dist Pc 360 &plusmn 120
  Names 55&nbspAquilae, HR &nbsp7570,<BR/> HD &nbsp187929, BD +00&deg4337,<BR/> FK5 &nbsp746, HIP &nbsp97804,<BR/> SAO &nbsp125159, GC&nbsp27517


Eta Aquilae (η Aql / η Aquilae) is a Star in the Constellation Aquila . It was also part of the former constellation Antinous .

It is a Cepheid Variable star, varying from Apparent Magnitude 3.6 to 4.4 with a period of 7.176641 days. Along with Delta Cephei , Zeta Geminorum and Beta Doradus, it is one of the most prominent Naked Eye Cepheids; that is, both the star itself and the variation in its brightness can be distinguished by the naked eye. Some other Cepheids such as Polaris are bright but have only a very small variation in brightness.

It is about 1200 Light Year s from Earth. It is a yellow-white Supergiant , and is about 3000 times more luminous than the Sun , with a diameter about 60 times that of the Sun.