Emily Costello, University of Hawaii at Manoa, Honolulu, HI, United States, Cynthia B Phillips, JPL / NASA / Caltech, Pasadena, CA, United States, Rebecca R Ghent, University of Toronto, Toronto, ON, Canada, Masatoshi Hirabayashi, University of Colorado at Boulder, Boulder, CO, United States and Paul G Lucey, Hawaii Inst Geophys & Planetol, Honolulu, HI, United States