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. 2005 Oct 14;310(5746):265-9.
doi: 10.1126/science.1118978. Epub 2005 Sep 8.

Deep Impact: observations from a worldwide Earth-based campaign

K J Meech  1 , N Ageorges, M F A'Hearn, C Arpigny, A Ates, J Aycock, S Bagnulo, J Bailey, R Barber, L Barrera, R Barrena, J M Bauer, M J S Belton, F Bensch, B Bhattacharya, N Biver, G Blake, D Bockelée-Morvan, H Boehnhardt, B P Bonev, T Bonev, M W Buie, M G Burton, H M Butner, R Cabanac, R Campbell, H Campins, M T Capria, T Carroll, F Chaffee, S B Charnley, R Cleis, A Coates, A Cochran, P Colom, A Conrad, I M Coulson, J Crovisier, J deBuizer, R Dekany, J de Léon, N Dello Russo, A Delsanti, M DiSanti, J Drummond, L Dundon, P B Etzel, T L Farnham, P Feldman, Y R Fernández, M D Filipovic, S Fisher, A Fitzsimmons, D Fong, R Fugate, H Fujiwara, T Fujiyoshi, R Furusho, T Fuse, E Gibb, O Groussin, S Gulkis, M Gurwell, E Hadamcik, O Hainaut, D Harker, D Harrington, M Harwit, S Hasegawa, C W Hergenrother, P Hirst, K Hodapp, M Honda, E S Howell, D Hutsemékers, D Iono, W-H Ip, W Jackson, E Jehin, Z J Jiang, G H Jones, P A Jones, T Kadono, U W Kamath, H U Käufl, T Kasuga, H Kawakita, M S Kelley, F Kerber, M Kidger, D Kinoshita, M Knight, L Lara, S M Larson, S Lederer, C-F Lee, A C Levasseur-Regourd, J Y Li, Q-S Li, J Licandro, Z-Y Lin, C M Lisse, G LoCurto, A J Lovell, S C Lowry, J Lyke, D Lynch, J Ma, K Magee-Sauer, G Maheswar, J Manfroid, O Marco, P Martin, G Melnick, S Miller, T Miyata, G H Moriarty-Schieven, N Moskovitz, B E A Mueller, M J Mumma, S Muneer, D A Neufeld, T Ootsubo, D Osip, S K Pandea, E Pantin, R Paterno-Mahler, B Patten, B E Penprase, A Peck, G Petitas, N Pinilla-Alonso, J Pittichova, E Pompei, T P Prabhu, C Qi, R Rao, H Rauer, H Reitsema, S D Rodgers, P Rodriguez, R Ruane, G Ruch, W Rujopakarn, D K Sahu, S Sako, I Sakon, N Samarasinha, J M Sarkissian, I Saviane, M Schirmer, P Schultz, R Schulz, P Seitzer, T Sekiguchi, F Selman, M Serra-Ricart, R Sharp, R L Snell, C Snodgrass, T Stallard, G Stecklein, C Sterken, J A Stüwe, S Sugita, M Sumner, N Suntzeff, R Swaters, S Takakuwa, N Takato, J Thomas-Osip, E Thompson, A T Tokunaga, G P Tozzi, H Tran, M Troy, C Trujillo, J Van Cleve, R Vasundhara, R Vazquez, F Vilas, G Villanueva, K von Braun, P Vora, R J Wainscoat, K Walsh, J Watanabe, H A Weaver, W Weaver, M Weiler, P R Weissman, W F Welsh, D Wilner, S Wolk, M Womack, D Wooden, L M Woodney, C Woodward, Z-Y Wu, J-H Wu, T Yamashita, B Yang, Y-B Yang, S Yokogawa, A C Zook, A Zauderer, X Zhao, X Zhou, J-M Zucconi
Affiliations

Deep Impact: observations from a worldwide Earth-based campaign

K J Meech et al. Science. .

Abstract

On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics.

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