Broschiertes Buch

Eta Andromedae

Constellation, Binary star, Star, Andromeda (constellation), Stellar classification, Subgiant, Giant star

Herausgegeben: Bert, Adam Cornelius

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Eta Andromedae is a spectroscopic binary star in the constellation of Andromeda. It consists of two G-type subgiant or giant stars orbiting each other with a period of 115.7 days and has an overall apparent visual magnitude of approximately 4.403. Eta Andromedae was discovered to be a double-lined spectroscopic binary in a series of spectra taken in 1899 and 1900. Its orbit was computed in 1946 from spectroscopic observations.