Arcturus was a planet in the Galactic Federation and the home world of the Arcturans.

The Osirans had an orbital Mobius strip near Arcturus. (PROSE: River of Time)

A Von Neumann probe landed on Arcturus and started to build a city, despite the planet already being populated. (PROSE: The Big Hunt)

Arcturus lacked mineral wealth. Its ambassador, Arcturus, attempted to prevent the planet Peladon from joining the Federation so it could forge a personal alliance to take their minerals. This plan failed when Arcturus was killed. (TV: The Curse of Peladon)

When Davros revived and demanded to know what had happened while he was in suspended animation, the Fourth Doctor told him that Arcturus had won the Galactic Olympic Games with Betelgeuse coming in second. (TV: Destiny of the Daleks)

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