Abstract
Prior to the selection of the comet 9P/Tempel 1 as the Deep Impact mission target, the comet was not well observed. From 1999 through the present there has been an intensive world-wide observing campaign designed to obtain mission critical information about the target nucleus, including the nucleus size, albedo, rotation rate, rotation state, phase function, and the development of the dust and gas coma. The specific observing schemes used to obtain this information and the resources needed are presented here. The Deep Impact mission is unique in that part of the mission observations will rely on an Earth-based (ground and orbital) suite of complementary observations of the comet just prior to impact and in the weeks following. While the impact should result in new cometary activity, the actual physical outcome is uncertain, and the Earth-based observations must allow for a wide range of post-impact phenomena. A world-wide coordinated effort for these observations is described.
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Meech, K.J., A’Hearn, M.F., Fernández, Y.R. et al. The Deep Impact Earth-Based Campaign. Space Sci Rev 117, 297–334 (2005). https://doi.org/10.1007/s11214-005-3382-8
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DOI: https://doi.org/10.1007/s11214-005-3382-8