Eta Aquarii [SEP] constellation
Eta Aquarii
Eta Aquarii, Latinized from η Aquarii, is the Bayer designation for a star in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of 4.04. The distance to this star, as determined by parallax measurements, is about . 
Eta Aquarii is near the radiant of a meteor shower named after it.
Eta Aquarii has a stellar classification of B9IV-Vn, which may indicate that it is beginning to evolve away from the main sequence into a subgiant as
, (), meaning "Tomb", refers to an asterism consisting of Gamma Aquarii, Zeta Aquarii, Eta Aquarii and Pi Aquarii. Consequently, the Chinese name for Gamma Aquarii itself is (, ).
Properties.
Gamma Aquarii is a spectroscopic binary with a period of 58.1 days.
It presents as an A-type main sequence star with a stellar classification of A0 V, around two and a half times more massive than the Sun. It is a candidate Lambda Boötis star, suggesting it