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Iota Geminorum was a planetary system inside Klingon space in the Beta Quadrant. It was a single star system containing at least four planets, including the tribble homeworld Iota Geminorum IV. In the 23rd century, this system was within the Klingon Empire's sphere of influence.

Stellar cartography[]

The Iota Geminorum system was visible from Earth in the constellation Gemini. It was approximately 120.4 light years from Sol.

In 2257, this system's location was labeled on the star chart showing the trajectory of Lieutenant Spock's shuttle. (TOS: "The Trouble with Tribbles"; DIS: "An Obol for Charon")

In 2258, the system's location was labeled on a star chart seen on the main viewscreen of the USS Enterprise. (DIS: "Such Sweet Sorrow, Part 2")

This star system was only mentioned in writing.
Information on this system was derived from the episodes and films, the reference works Star Trek: Star Charts and Stellar Cartography: The Starfleet Reference Library, and real-world sources. The reference works were used extensively in the creation of star charts seen in Star Trek: Discovery, Star Trek: Picard, Star Trek: Strange New Worlds, Star Trek: Prodigy, and Star Trek: Lower Decks. The real-world information added to the article was current as of 2025.
The primary of the Iota Geminorum system was classified as a G-type star by the Star Trek: Star Charts (p. 64).

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