D'deridex
D'deridex was a star system in the Beta Quadrant. 

In 2256, its location in Klingon space was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the . ()

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 green color, indicating that it was affiliated with the Romulan Star Empire. ()

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Star systems