Planet in the Foxtrot Alpha Six simulation, suggested destination by Samantha Carter for a deteriorating naquadah reactor, which had been rigged to explode. It is likely that the game element matches a real-world planet known by Stargate Command to be uninhabited.
HOME TO - Unknown
FIRST APPEARED - N/A
Avatar - Carter orders Sergeant Harriman to dial P4M-523, but he is zatted by a Goa'uld'ed Dr. Jackson before he can complete the dialing sequence.