ATV-54 Nebula is a location in the Galaxy Quest fictional universe not to be confused with the Galaxy Quest real world. This Nebula was mentioned in the episode The Nixvowls Uprising. This is where the Megabuckle Asteroid Belt is located.
The Megabuckle Asteroid belt is a asteroid belt located in this Nebula. This is a place where a fictional battle occurred between The Protectron and crew versus the Ship Sarris was commanding fought Including fictional characters of Gath'gor, Sarris and Ngh'f and as always Commander Tagart and his crew defeated the aliens.