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D.C. Boice (SwRI), R. Wegmann (MPIA), J.-I. Watanabe (NAOJ)
A comet model is presented for 19P/Borrelly during the Deep Space 1 encounter. The model consistently represents the dusty coma from the irregularly shaped nucleus to the solar wind interaction region with detailed photo and gas-phase chemistry; dust entrainment by the gas with fragmentation and distributed gaseous sources; separate energy balance for electrons, ions, and neutrals; and separate flow of the neutral gas, plasma, and fast atomic and molecular hydrogen. Neutral gas and plasma dynamics and spatial distributions of various species and dust are presented for scientific planning and risk assessment for the Deep Space 1 encounter. The visibility of the nucleus embedded in the dust coma is addressed. Predictions of the x-ray emissions are made for coordinating in situ plasma measurements with Earth-based observations as well as other predictions for experiments planned during the encounter.