Mustafar was a planet within the eponymous system of the Atravis sector, in the Outer Rim Territories. It was a small world situated in grid square L-19 of the Standard Galactic Grid, and it lay on the Tosste Spur trade route, off the Rimma Trade Route. A part of the Western Reaches, Mustafar was located 53,000 light-years from the galaxy’s Core.

With an overlapping orbit, Mustafar was the third orbit of its system around the primary star Priate, completing a full rotation every 36 standard hours and a revolution around its sun every 412 local days, the equivalent of 618 standard days. It had a diameter of 4,200 kilometers, or 2,610 miles, and was a terrestrial world classed as a wasteland during the Imperial Era.

Nourished by the power of the Bright Star artifact, it was once a temperate and lush garden world that thrived with lifeforms that inhabited forests. Millennia before the Imperial Era, Mustafar became an unstable volcanic world with underground caves and lava constituting 35% of its surface, taking the form of lava seas, rivers, and pits interspersed with glens, molten rock plains, as well as obsidian mountain ranges and shores. Few areas were temperate enough to sustain life, and only a few landmasses were not fractured by tectonic disruption and magma flows; allowing lifeforms to evolve deep underground.

The tortured planet was powerful in the dark side of the Force, and, along with valuable mineral allotropes that surfaced from the planet core as well as its obscurity to the wider galaxy, attracted various off-world interests that exploited the molten planet. Mustafar remained a fiery world until the destruction of the Bright Star, at which point the planet was allowed to regrow. Such different states of the world led some to believe that spiritual forces were the catalysts to the changes in Mustafar’s nature.