Peter Buhler, Pasadena, California, United States, Andrew P. Ingersoll, California Institute of Technology, Pasadena, CA, United States, Sylvain Piqueux, Jet Propulsion Lab, Pasadena, CA, United States, Bethany L Ehlmann, California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States and Paul Ottinger Hayne, University of Colorado, Boulder, CO, United States