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Luke NowickiDepartment of Earth and Planetary Sciences
 Washington University in St. Louis
 Advisors: William B. McKinnon and Kelsi N. Singer
 Abstract
 By mapping secondary craters around large craters on two of Jupiter's Galilean satellites the importance of sesquinary impacts on the cratering records of all Jupiter's moons was studied. To accomplish this task the regions around two large primary craters, Tyre and Achelous, were investigated for secondary cratering. These secondaries were then used to find the maximum size of fragments that can reach the escape velocity of the moon under study. The fragments that do escape then form a pool of potential sesquinary cratering candidates, which in turn provides information about the importance of sesquinary cratering on these satellites.
 Luke Nowicki  is a junior at Washington University in St. Louis, where he studies in the university's Earth and Planetary Sciences department. He hopes to continue his study of planetary science for the foreseeable future.
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