Eta Aquilae
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 52m 28.4s |
| Declination | +1° 00' 20" |
| Apparent magnitude (V) | +3.87 |
| Distance | 1180 ± 390 ly (360 ± 120 pc) |
| Spectral type | F6Ib |
| Other designations | |
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 years 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.
[edit] Location
The star's location in the constellation of Aquila is shown in the following map:
