The planet of Tion was situated within the Tion system. This star system resided in the Tion Cluster, a region of the Outer Rim Territories, specifically within the Tion Hegemony.
- " Twinkle, Twinkle Little Star, How I Wonder Where We Are " — Voyages SF 13 (Unlicensed) (First mentioned)
- The Essential Atlas
- Star Wars: The Essential Atlas Online Companion on StarWars.com (article) (backup link)
- Essential Atlas Extra: The History of Xim and the Tion Cluster on StarWars.com (article) (backup link)