Phelarion was a planet located in the Seswenna sector, in the Outer Rim Territories. In was the homeworld of the wealthy Motti family, which included figures prominent in the Galactic Empire such as Lady Thalassa Tarkin, wife of Grand Moff Wilhuff Tarkin, and Conan Antonio Motti, Admiral of the Imperial Navy. The Motti family were wealthy citizens in the megonite moss mining business, established in the centuries prior to 60 BBY, using slave labor.