“Project Skymother” is to my knowledge widely believed to be the Minmatar Iapetan Titan.
Actually I wonder why the Yan Jung are mentioned in the chronicle, as what they’re discussing appears to fit the Talocan more:
As the researcher says that the other device is from wormhole space specifically; There are no Yan Jung ruins that I’m aware of in Anoikis, only known Yan Jung ruins are in “known space”. But in Anoikis accompanying the Sleeper ruins there are Talocan vessels - most are too irradiated to enter, but the Polestar (that’s what I think it’s called) seems to be searchable, if dilapitated. Also, when they talk about massive ship engines, there is a place on Matar called the “Crystal Steppe”, formed by the intense heat of a massive colonization ships’ equally massive thrusters. It has always been assumed that it was left by the original colonists to Matar, but just maybe the Talocan - or Yan Jung - visited Matar sometime in the past?
As an additional theory, as there is absolutely no clue about what happened to the Yan Jung, I have to wonder if they merged with or even became the Talocan at some point. Their specializations at least seem to have some parallels and seem to complement eachother.