M4H-212
From The Stargate Omnipedia
World initially considered to be the location for the Pegasus Galaxy Alpha Site, but Sergeant Bates quickly discounted it, reporting it was crawling with Genii spies.
DETAILS
HOME TO - Unknown
FIRST APPEARED - N/A
KEY EPISODE
The Siege, Part 1 - Bates declares M4H-212 to be a no-go for a Pegasus Alpha Site.