What happened to Tutrietov?
Tutrietov was an Earth sized planet in the habitable zone, and was also last to become a potential home for humanity. Andromedo's gravity captured it (which forced Toxile to orbit further away). Tutrietov's orbit got so eccentric that it got ejected from Andromedo. Recent studies say that Tutrietov now has a stable orbit between Jool and Roro.