Institution: | (1) INAF-Osservatorio Astronomico, vic. Osservatorio 5, 35122 Padova, Italy;(2) Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA;(3) Dept. Astronomy & Space Phys., Uppsala University, Uppsala, Sweden;(4) Physikalisches Institut, University of Bern, Bern, Switzerland;(5) IKI, Moscow, Russia |