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Alzirr, also known as Xi Geminorum or 31 Geminorum, was a star system in the Beta Quadrant. (ENT: "Cold Station 12")

Components

Stellar system

This was a single star system. The primary was the F-type subgiant Alzirr (the proper name for Xi Geminorum).

History

When the Venari Ral laid Omega-47 mines around the core of Federation space in 3196, this system was within the enclosed region. (SA: "300th Night", "Rubincon")

Stellar cartography

The Alzirr system was visible from Earth in the constellation Gemini. It was approximately 59 light years from Sol.

In 2154, this system's position was labeled on an United Earth star chart which was used to display the location of Cold Station 12 to the crew of the Enterprise. (ENT: "Cold Station 12")

In 3196, this system's position was labeled on a Federation star chart which was displayed on the main viewscreen of the USS Athena bridge. (SA: "Ko'Zeine")

Later that year, during the Omega-47 crisis, the location of Alzirr (Xi Geminorum) was depicted on star charts and readouts used across several locations on the USS Athena to locate, monitor, and respond to the Omega-47 mines laid by the Venari Ral. (SA: "300th Night", "Rubincon")

This star system was only mentioned in writing.
Information on this system was derived from the episodes and films, from the reference works Star Trek: Star Charts and Stellar Cartography: The Starfleet Reference Library, and from 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, Star Trek: Lower Decks, and Star Trek: Starfleet Academy. The real-world information added to the article was current as of 2026.

External links