1. Institute of Space Astrophysics and Planetology, IAPS-INAF, Rome, Italy
2. IAG, Universidade de Sao Paulo, São Paulo, Brazil
3. Observatório Nacional, COAA, Rio de Janeiro, Brazil
4. Instituto de Astonomía y Ciencias planetarias de Atacama, Univesity of Atacama, Copiapo, Chile
5. Observatory of Padova, INAF-OAPd, Padova, Italy
6. Department of Physics and Astronomy “G. Galilei”, University of Padova, Padova, Italy