1. Planetary Geoscience Institute and Department of Earth and Planetary Sciences; University of Tennessee; Knoxville Tennessee USA
2. Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica; Rome Italy
3. Max Planck Institut fur Sonnensystemforschung; Katlenburg-Lindau Germany
4. Department of Space Studies; University of North Dakota; Grand Forks North Dakota USA
5. Planetary Science Institute; Tucson Arizona USA
6. Department of Mineral Sciences; Smithsonian Institution; Washington DC USA
7. Astromaterials Research Office; NASA Johnson Space Center; Houston Texas USA
8. Institut de Recherche en Astrophysique et Planetologie; University of Toulouse; Toulouse France
9. Lunar and Planetary Institute; Houston Texas USA
10. Jet Propulsion Laboratory; Pasadena California USA
11. Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA