The system contained the spaceport planet Ione, which had an indigenous population of about 1 billion.
In 3 ABY, the Star Destroyers Avenger and Stalker, temporarily detached from Death Squadron as part of the search for the Rebel Alliance's new base, dispatched a number of probe droids from the Ione system to nearby Allyuen, Hoth and Tokmia.
- LEGO Star Wars: The Complete Saga (Non-canonical appearance)
- LEGO Star Wars II: The Original Trilogy (Non-canonical appearance)
- Star Wars Episode V: The Empire Strikes Back junior novel
- Star Wars: Episode V The Empire Strikes Back