Proxima 2

Proxima 2 was the first planet other than Earth to be colonised by humans.

Geography
Proxima 2 contained at least one ocean and a continental mass with a prominent mountain range. Proxima City was located on this continent. (PROSE: The Face-Eater)

History
Humans travelling in their colony ship, the New Horizon, first settled on Proxima 2 in 2128. It took them 8 years to get the planet up and running as a proper colony. (PROSE: The Face-Eater)


 * Presumably, the planet belonged to the Proxima Centauri system.