1. NASA Goddard Space Flight Center; Greenbelt Maryland USA
2. Center for Earth and Planetary Studies, Smithsonian National Air and Space Museum; Washington District of Columbia USA
3. Planetary Science Institute; Tucson Arizona USA
4. SETI Institute; Mountain View California USA
5. Johns Hopkins University, Applied Physics Laboratory; Laurel Maryland USA
6. U.S. Geological Survey; Flagstaff Arizona USA
7. Lunar and Planetary Laboratory; University of Arizona; Tucson Arizona USA
8. INAF Osservatorio Astronomico di Capodimonte; Naples Italy