Eta Geminorum
Star system
![How I Pried a Piece off of Propus (Eta [η] Geminorum) | Star-Splitters](/imgres?imgurl=https://bestdoubles.files.wordpress.com/2011/03/gemini1.jpg&imgrefurl=https://bestdoubles.wordpress.com/2011/03/06/how-i-pried-a-piece-off-of-propus-eta-%25CE%25B7-geminorum/&h=499&w=603&tbnid=TRtgpj_RRKBXzM&q=Eta+Geminorum&tbnh=112&tbnw=135&usg=AI4_-kTgyqzKcCD-xOAqliLQAwSJT7zOdA&vet=1&docid=m8k0GbiVsz-leM&sa=X&ved=2ahUKEwic_qeApMuFAxUXvokEHU3wB2sQ9QF6BAgAEAo)
Eta Geminorum, formally named Propus, is a triple star system in the constellation of Gemini. It is a naked-eye variable star around 380 light years from the Sun. Wikipedia
Surface temperature: 3,548 K
Distance to Earth: 391.4 light years
Magnitude: 3.31
Constellation: Gemini
Absolute magnitude: -1.87
Luminosity: 10,276 L☉
Radius: 275 R☉