- Propus (stars.astro.illinois.edu)
PROPUS (Eta Geminorum). Gemini, the Twins, represented by Castor (Alpha Geminorum) and Pollux (Beta Gem) at its northern end, is anchored at the bottom by Alhena (Gamma) and at the southwest corner by a pair of similar stars, Tejat (Mu Gem) and our Propus, to which Bayer assigned the Greek letter Eta.
- Eta Geminorum (Wikipedia)
Eta Geminorum (η Geminorum, abbreviated Eta Gem, η Gem), formally named Propus /ˈproʊpəs/, is a triple star system in the constellation of Gemini. It is a naked-eye variable star around 380 light years from the Sun.
