Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..539s&link_type=abstract
In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 539-546 (SEE N88-21884 14-91)
Physics
Comet Nuclei, Core Sampling, Mission Planning, Return To Earth Space Flight, Space Missions, Boring Machines, Electric Propulsion, Propulsion System Configurations, Spacecraft Design
Scientific paper
A comet nucleus sampling scenario is proposed. Material samples for analysis in earth-based laboratories should be collected continuously to a depth of 3 m below the surface, and at a solar distance of at least 2.5 AU where the comet surface is inactive. The spacecraft is propelled by chemical and electric thrusters. While hovering above the comet nucleus at an altitude of 500 to 1000 m, the spacecraft will dispatch a rotating drill on a tether. The drill pipe will be driven into the nucleus by a rocket-powered reaction wheel. The inner pipe of the drill, when filled with cometary material, will be withdrawn by the tether, stored on the spacecraft, and transported back to Earth.
Bassner Helmut
Fechtig Hugo
Igenbergs Eduard
Kuczera Heribert
Loeb Horst
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