Water, heat, bombardment: The evolution and current state of (2) Pallas

► Pallas' surface and density imply water was important in its evolution and maybe today. ► If Pallas forms early, it can “differentiate” a water ice layer. ► Impacts and sublimation can remove a large amount of water ice from Pallas. ► Pallas probably formed water-rich and has lost most of its water.