The activity cycle of 67P/Churyumov-Gerasimenko

C. Snodgrass1, L. Barrera2, H. Boehnhardt1, A. Guilbert-Lepoutre3, O. Hainaut4, D. Hutsemekers5, E. Jehin5, K. Meech6, C. Opitom5, R. Schulz3, G. Tozzi7, and C. Tubiana1 1Max Planck Institute for Solar System Research, Germany 2Universidad Metropolitana de Ciencias de la Educacioon, Chile 3European Space Agency, The Netherlands 4European Southern Observatory, Germany 5Universite de Liege, Belgium 6University of Hawaii, USA 7INAF Osservatorio Astrofisico di Arcetri, Italy