Space Station Sigma One was a Federation space station located near Andor.

In 2275 the station was under the command of Commodore Maxwell Petersen, when the USS Enterprise docked there for shore leave. While on leave, Pavel Chekov was arrested for disarming an Orion police officer who was assaulting a civilian in the search for Muav Haslev. Haslev was actually on the station and ended up beaming onto the Enterprise from the station. (TOS novel: Death Count)

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