UNSC Onan

Onan Station, Hull Classification Symbol ODA-147, was one of the 300 Orbital Defense Platforms built over Earth by the UNSC. Its shipping section had the reputation for having some of the longest inspections in the galaxy.

It is the location of the Halo 2 multiplayer map Elongation.

Trivia

 * Onan Station is, to date, the only station in orbit around a fictional city. There is no location on Earth currently named "Onan", though its possible Onan is a future city of Earth.
 * The Station appears to be over central Africa, making it possible that Onan Station is in one of the other battle clusters that can be seen out Cairo Station's windows.