The Hades system (FID: SY-IV-2H) is a star system located in Human Federation space. Inhabited primarily by humans, the Hades system has been a colony of the Federation since it was first settled in 2124. The system was one of the first examples of intensive planet terraformation outside of the Sol Group, with the capital planet Elysium being the only atmospherically breathable planet in the system. The Hades system consists of the red dwarf Hades, two terrestrial planets: Elysium and Phlegethon, and two gas giants: Acheron and Tatarus.