Altair IV
From FreeSpace Wiki
Altair IV is one of an undislosed number of sites which have harboured Ancient technology. Fleeing their homeworld as it was ravaged by the SD Lucifer, a group of Vasudan scientist/refugees had to make emergency landfall as their lifeboat lost power.
They found an Ancient data recorder which possessed key information relating to the Lucifer's achilles heel and subsequent destruction.