Janus' research outpost was on the planet M6H-987 in the Pegasus galaxy. It was, until recently, inhabited by the Vanir, and was where the Attero device was located.
History[]
The outpost was used by Janus to conduct his research, which was discovered by the Vanir, who reactivated the Attero device there with the help of Dr. Rodney McKay and Dr. Daniel Jackson. The Vanir evacuated, the Attero device was shut down, and the outpost was destroyed by a Traveler ship during the Battle of M6H-987. (SGA: "First Contact", "The Lost Tribe")