1. Cornell Center for Astrophysics and Planetary Sciences Cornell University Ithaca NY USA
2. NASA Ames San Jose CA USA
3. Deutsches Zentrum für Luft ‐und Raumfahrt (DLR) Institut für Planetenforschung, Asteroiden und Kometen Berlin Germany
4. Physics Department Auburn University Auburn AL USA
5. Jet Propulsion Laboratory Pasadena CA USA
6. International Space Science Institute (ISSI) Bern Switzerland
7. Department of Earth, Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge MA USA