The Halley dust and gas environment (IACG WG-1)

Details The Halley dust and gas environment (IACG WG-1) The Halley dust and gas environment (IACG WG-1)

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp1066..217r&link_type=abstract

In ESA Space Missions to Halley's Comet p 217-231 (SEE N86-32452 24-12)

Mathematics

Flyby Missions, Halley'S Comet, Interplanetary Dust, Interplanetary Gas, Mathematical Models, Comet Heads, Comet Nuclei, Comet Tails, Computer Systems Programs, Impact Damage, Satellite-Borne Instruments

Scientific paper

A dust model for the ambient Halley coma assuming homogeneous dust emission from the nucleus surface, including the proper mathematical description of all known major effects was derived. The model was based on 1910 observations of Halley's Comet, updated with observational data from the 1986 appearance. The dust-model computer program was distributed to scientists and spacecraft engineers, while dust-model tables for the Giotto, Vega-1, Vega-2 and Suisei flyby times/distances were distributed to the flight projects to calculate survival probabilities and optimal apertures. Based on the model it was suggested that the Suisei spacecraft, which carries no dust protection shield, could be safely targeted to pass the comet nucleus at a distance of less than 200 000 km and still avoid dust impacts completely.

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