Eta Geminorum
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Eta Geminorum (η Gem / η Geminorum) is a star in the constellation Gemini. It also has the traditional names Tejat Prior and Propus.
Eta Geminorum is a semiregular variable star of the Mu Cephei type, whose brightness changes with a period of 235 days between magnitude +3.24 and +3.96. It is located 250 light years from the Sun, and is a red giant of the spectral type M3.
Eta Geminorum is near the ecliptic, so it can be occulted by the Moon and very rarely by planets. The last occultation by a planet took place on July 27 1910 by Venus, and the next to last on July 11 1837 by Mercury.
Coordinates (equinox 2000)
- Right ascension: 6h11m56s
- Declination: 22°31'0"
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