Roon Drainsweeper was a sporting activity. An advertisement owned by the gambler Lando Calrissian during the time of the Imperial Era indicated it was one of the sports that one could bet on at Canto Bight. The sport's title was the same as the astronomical body known as Roon.
The initial mention of Roon Drainsweeper occurred in Star Wars: Smuggler's Guide, a reference work penned by Daniel Wallace and published in 2018.