Comet C/2006 s4 (christensen)
Ken Ichi Kadota,D Herald,Alexandr Baransky, J Y Young,E Sheridan, M E Van Ness,E Christensen,E C Beshore, G J Garradd, A R Gibbs,A D Grauer, R E Hill, R A Kowalski, S M Larson, R H Mcnaught,Douglas T Durig, I H Gray, B G Marsden mag(2006)
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