1. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
2. Independent Scholar Stuttgart Germany
3. British Astronomical Association London UK
4. Planetary Science Institute Tucson AZ USA
5. Division of Geological and Planetary Sciences, California Institute of Technology Pasadena CA USA
6. College of Engineering and Applied Sciences, Western Michigan University Kalamazoo MI USA
7. Department of Astronomy, University of California Berkeley CA USA
8. SETI Institute Mountain View CA USA
9. NASA Goddard Space Flight Center Greenbelt MD USA
10. Department of Physics and Astronomy, University of Leicester Leicester UK
11. Malin Space Science Systems San Diego CA USA
12. National Center for Atmospheric Research Boulder CO USA
13. Space Science and Engineering Division, Southwest Research Institute San Antonio TX USA
14. Glendale Community College Glendale CA USA
15. Now at the University of California Davis CA USA
16. Harvard College Cambridge MA USA
17. Golden West College Huntington Beach CA USA
18. Now at the University of California Berkeley CA USA