C. De Sanctis, J.-L. Josset, S. Beauvivre, D. Koschny, P. Pinet, S. Chevrel, Y. Langevin, M. A.Barucci, P. Plancke, M. Almeida, B.A. Hofmann, K. Muinonen, V. Shevchenko, Yu. Shkuratov, P. Ehrenfreund and B.H. Foing, IASF (Area Ricerca Cnr, Via Fosso del Cavaliere, 00133 Roma, Italy), Space Exploration Institute (Case postale, CH-2002 Neuchâtel, Switzerland), Micro-cameras & Space Exploration (Jaquet-Droz 1, CH-2000 Neuchâtel, Switzerland), ESA/ESTEC (Keplerlaan 1, 2201 Noordwijk, The Netherlands), UMR 5562 CNRS/GRGS Observatoire Midi-Pyrénées (14, avenue Edouard Belin 31400 Toulouse, France), IAS (Bat. 121, 91405 Orsay, France), Observatoire Paris Meudon (Meudon , France), Natural History Museum (Bern, Switzerland), Helsinki Observatory (Kopernikuk sentie 1 P.O.Box 14, Finland), Sternberg Astronomical Institute (Moscow, 119899, Russia), Astronomical Institute of Kharkov National University (35 Sumskaya St. Kharkov. 61022. Ukraine), 12 Leiden Observatory & Austrian Academy of Sciences (P.O. Box 9513, 2300 RA Leiden, The Netherlands).