Reytan was a planet located in the space of the galaxy's Beta Quadrant, in orbit of the Reytan star system. This class M Federation world is in the Orion sector of the Sirius sector block. Federation scientists have found Reytan's desert climate to provide a fascinating study in extremes. Even the most populous regions of Reytan receive more than 27 hours of light per day, with the shorter nights causing temperates to plummet rapidly. Reytan's outer atmosphere is rife with theta radiation, leading Starfleet to install a number of communications array satellites around the world. (STO video game: Star Trek Online)

In the early 25th century, the Orion Syndicate often attempted to sabotage the delicate communications to and from Reytan, and use the communications nodes to their own ends. Starfleet's Commander Samuel Winters was in charge of dispatching aid and defense in such situations. (STO mission: "Reytan System Patrol")