Marcos XII
Marcos XII was the inhabited twelfth planet in its star system of the Alpha Quadrant. It contained a Federation settlement.

In 2268, Marcos XII had a population in the millions, with nearly one million of them being children. It was the first planet which the evil angel-being Gorgan decided to conquer once he was set loose. Gorgan used the children of the Starnes Exploration Party to capture the  starship  and was using the ship to go to there. Tommy Starnes claimed to have relatives on Marcos XII when asking James T. Kirk to take the orphans there. ()

In 2293, the location of Marcos XII in the Milky Way Galaxy was labeled in a star chart in Captain James T. Kirk's quarters aboard the . (, okudagram)

In 2328, this was the destination for passengers traveling from Manark IV City via commercial transport. Christopher Tezber and Duke Willer traveled on the . (, okudagram)

External link 
 

de:Marcus XII
Marcos 12