1. Astrogeology Team, U.S. Geological Survey; Flagstaff Arizona USA
2. Department of Astronomy; Cornell University; Ithaca New York USA
3. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
4. Niels Bohr Institute for Astronomy, Physics and Geophysics; University of Copenhagen; Copenhagen Denmark
5. Department of Geosciences; State University of New York; Stony Brook New York USA
6. NASA Johnson Space Center; Houston Texas USA
7. GHS Optics; Pasadena California USA