Derellium, a planet, resided in the Cronese Mandate, found within the Outer Rim Territories.
Derellium, a prominent agricultural world within the Tion Cluster, has earned local recognition for its exceptional wines. Certain wine collections from Cronese boast Derellium vintages that are centuries old.
Initially a member-world of the Kingdom of Cron, Derellium was later incorporated into Xim's empire. Following the empire's downfall, it continued its prosperity as a world within the Kingdom of Cron, ultimately becoming part of the Cronese Mandate.
During the closing years of the Galactic Republic, the worlds of the Tion Cluster aligned with the Confederacy of Independent Systems, subsequently joining the Galactic Empire.
- Essential Atlas Extra: The History of Xim and the Tion Cluster on StarWars.com (article) (backup link) (First mentioned)
- Xim Week: The Despotica (Part III: Xim at Vondor) on Hyperspace (article) (content obsolete and backup link not available)