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Calufrax IV was a planet located in the galaxy's Alpha or Beta Quadrants, the fourth planet in the Calufrax star system, in Federation space.
Calufrax IV's orbital space was the location of the Starbase 92 space station. (SCE eBook: War Stories, Book 1)
In 2290, the USS Enterprise-A and USS Excelsior visited Starbase 92 above Calufrax IV. (TOS comic: "No Compromise Part One")