Delta Darius is a star and associated star system located somewhere in the galaxy's Alpha or Beta Quadrants. Darius is the site of a planetary system that contains at least eleven worlds, including Darius III and Darius XI. Delta Darius was in the portion of Federation space denoted as the Starfleet Intelligence sector 1, near Jallamora. The closest Starfleet starbase to this system in the 23rd century was Starbase 8, although there was a Starfleet Intelligence base in the system, at Darius III. (FASA RPG module: Star Fleet Intelligence Manual; DS9 novel: Valhalla)