Alternative cometary targets for the Giotto extended mission

Details Alternative cometary targets for the Giotto extended mission Alternative cometary targets for the Giotto extended mission

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..727f&link_type=abstract

In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 727-731 (SEE N88-21884 14-91)

Other

Giotto Mission, Grigg-Skjellerup Comet, Mission Planning, Damage Assessment, Round Trip Trajectories, Swingby Technique

Scientific paper

The plan to use an Earth gravity-assist maneuver to redirect the Giotto spacecraft toward Comet Grigg-Skjellerup (GS) for an encounter in July 1992, and 2 additional cometary opportunities are discussed. The first is an encounter with Comet Hartley-2 (H2) in Aug., 1991. The H2 is intrinsically brighter than GS and the encounter would take place much closer to the Earth. The other potential target is Comet du Toit-Hartley (DTH), which is of considerable scientific interest because it split into 2 pieces during its 1979 apparition. Ths GS and H2 missions are the most viable; DTH is eliminated because its aphelion of transfer orbit and Sun distance at encounter (both 1.2 AU) are incompatible with Giotto's degraded thermal insulation.

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