PX3-808
From The Stargate Omnipedia
Planet visited by SG-6 along with Daniel Jackson for an archaeological excavation. This trip occurred during the time Earth's Stargate was connected to P3W-451 -- a planet on the edge of a black hole. This kept Earth's gate occupied for several days, preventing Jackson and SG-6 from returning home.
DETAILS
HOME TO - Unknown
FIRST APPEARED - A Matter of Time
KEY EPISODE
A Matter of Time - SG-6 performs an archaeological dig on PX3-808 with the aid of Dr. Daniel Jackson.