Starbase 522 was a Federation starbase facility in Starfleet service in the 24th century, located somewhere in the galaxy's Alpha or Beta Quadrant.
History and specifics[]
Starbase 522 was located in proximity to the Raknal and Ricktor star systems in the 2370s decade, during the Dominion War.
In the year 2375, the USS T'Mala towed the damaged USS Christopher to Starbase 522 after the Battle of Ricktor Prime. Subsequently, a Starfleet Corps of Engineers starship was assigned to pick up the drifting Cardassian Union derelict vessel Pakliros for transfer to Starbase 522.
After a military landing on Raknal V, the USS Enterprise-E took prisoner of war Gul Madred to Starbase 522. (TNG - The Sky's the Limit short story: "Four Lights")