Meteor Shower Parent Bodies
Most meteor showers are the leftover dust trails of comets, but what about the showers whose parents aren't active? How do we figure out which of these are "normal" dormant comets and which ones are now-inactive asteroids? What can we learn about meteor shower formation from studies of these rare objects?
The Active Centaurs
The Centaurs are the most recent escapees from the trans-Neptunian region and in turn are the primary source of the inner Solar System's Jupiter Family Comets. A small fraction of them show comet-like activity at distances too large for the sublimation of water ice to power it, so what's going on? What other ices and processes are in play, and how would a better understanding of Centaur evolution help us understand the JFCs and KBOs better?