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The OSIRIS imaging system of the ESA Rosetta mission: what is new after two years of orbiting around a comet.

Barbieri C., Bertini I., Cremonese G., Da Deppo V., Ferrari S., Ferri F., La Forgia F., Frattin E., Giacomini L., Lazzarin M., Lucchetti A., Magrin S., Marzari F., Massironi M., Naletto G., Pajola M., Penasa L., Simioni E., Sierks H. per il Team OSIRIS
  Lunedì 26/09   15:00 - 19:00   Edificio Psicologia 2 - Aula 2E   III - Astrofisica
The ESA Rosetta mission had its rendez-vous with 67/P Churyumov-Gerasimenko comet on May 2014. Since then it has been orbiting around the comet passing very important and exciting milestones: the delivery of the lander Philae, the perihelion passage, and now the "controlled impact" on the comet nucleus. During all these months OSIRIS, the Rosetta imaging system, has acquired more than 50000 images of the comet nucleus and coma, and has provided a huge amount of new information on this comet. We will describe what we learned by the analysis of these images, and what still remains to be understood.