M1B-129
Astrographical information
Address
Galaxy	Pegasus
Societal information
Race	Uninhabited
Earth interest	Former Wraith laboratory
Out of universe information
Appearances	"Phantoms"

[Source]

M1B-129 was a planet in the Pegasus galaxy. The world had a hidden Wraith science laboratory. They were experimenting with a Wraith Hallucination generator, so they could change their prey's mind against their desire. The Wraith gave up the project when the Genii discovered the technology but could not deactivate it. (ATL: "Phantoms")