1. School of Physics and Astronomy University of Leicester Leicester UK
2. Jet Propulsion Laboratory, California Institute of Technology Pasadena CA USA
3. Southwest Research Institute San Antonio Texas, TX USA
4. JUPOS Team and British Astronomical Association, Burlington House, Piccadilly London UK
5. Independent Scholar Stuttgart Germany
6. Department of Astronomy University of California Berkeley Berkeley CA USA
7. Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica Rome Italy