Located in the Atravis sector, the planet with no moon. Mustafar, is a small volcanic planet (having a 4200 kilometres / 2609.759 miles diameter) located in the Mustafar system, situated between two gas giants in the Outer Rim Territories that was aligned with the Confederacy of Independent Systems during the Clone Wars and was later taken over by the Galactic Empire after the Techno Union was nationalized at the conclusion of the conflict. During the Imperial Era, Mustafar became an imperial occupied world as it housed the personal castle of Darth Vader. As well as being used as a place to torture and execute Jedi that survived order 66.
With its searing climate, and a terrain of lava rivers and volcanos, Mustafar has only a small population of 20,000 inhabited only by the Native Mustafarians