P89-534 was a planet visited by SG-11. They never returned from the mission to that planet and were declared Missing in Action (MIA) by General Hammond. As SG-1 later learned, SG-11 was captured by Apophis while on P89-534 and taken to another planet. The team was tortured and eventually killed when they resisted training human slaves about Earth and Stargate Command.
--Aurora 17:04, 25 May 2006 (PDT)