Comet P/2007 c1 (christensen)
L Tesi,G Fagioli, Andrea Boattini,Mariana Mazzucato,F Dolfi,Maura Tombelli, G Forti, R Naves, M Campas, W Hasubick,Takahiro Seki,D Mayes,Douglas T Durig, Thomas R Williams, John K Bates,Paul C Kocher, B G Marsden mag(2007)
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