It was an Imperial prison planet where Luke Skywalker was once captured and detained, but escaped. The planet was heavy clouded by a poisonous atmosphere that contained hydrogen fluoride. Its surface temperature was around 477 degrees Celsius, and its atmospheric pressure was ten times higher than the galactic average. It had 124 orbital sensor stations, and the prison contained 1,400,036 cell blocks, each with 4,000 cells.
- Jedi's Honor (First appearance)