Coridan system
The Coridan system was an inhabited planetary system in the Alpha Quadrant. This system consisted of the primary  and the inhabited planet Coridan. This was the homeworld for the Coridanites, a warp-capable humanoid species. Other planets in this system were colonized by this species prior to 2151. 

In 2151, Captain Archer and T'Pol visited Coridan, were captured by rebels, and were freed by Andorian agents, including Thy'lek Shran. ().

In 2257, during the first , this system was occupied by the Klingons. () 

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the . () 

Prior to the Babel Conference of 2268, the Coridan system was claimed by some Federation races, and there were reports by Starfleet Intelligence that Orion smugglers had been raiding the system. After the conference, the Coridan planets were admitted to the United Federation of Planets. The system was located near to the planets  and , and several unidentified neutral worlds. (; ; )

In 2373, Kandra Vilk moved from Deep Space 9 to a neutral planet near the Coridan system because of the impending war with the Dominion. ()

The Coridan system was a target of Jem'Hadar raids during the Dominion War due to its importance as a source of dilithium, even though it was not on the front lines. ()

In 2399, the location of Coridan was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancys office at Starfleet Headquarters. This system was in or near to Federation space. ()

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Star systems