Deep Impact: observations from a worldwide Earth-based campaign.
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.
Meech
K J
KJ
Institute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USA.
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D019443:Cosmic Dust; D018538:Jupiter; D019110:Meteoroids; D009930:Organic Chemicals; D010783:Photometry
D019443:Cosmic Dust; D009930:Organic Chemicals