Context. For several years, Jupiter-family comets have been the targets of spacecraft missions whose aims are to determine the comets’ composition, structure, and physical properties. The Rosetta mission is currently flying towards comet 67P/Churyumov Gerasimenko for a rendezvous in August 2014 and comet 46P/Wirtanen is considered for a rendezvous in 2021 with the PriME (Primitive Material Explorer) mission, which is currently proposed to NASA.
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Marboeuf et al. (2010) studied this question.
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