Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302...23s&link_type=abstract
In ESA, Physics and Mechanics of Cometary Materials p 23-29 (SEE N90-19989 12-90)
Physics
2
Comet Nuclei, Dust, Ice, Models, Petrology, Regolith, Stratigraphy, Surface Properties, Acquisition, Analogs, Core Sampling, European Space Programs, Inorganic Compounds, Mission Planning, Nasa Space Programs, Organic Compounds, Return To Earth Space Flight
Scientific paper
Based on the most probable ranges of the interior and surface properties of a comet nucleus as far as they are relevant for the planning of a comet nucleus sample return mission (Rosetta), documented according to the present status of discussion within the joint Rosetta science working group of ESA and NASA, a comet nucleus regolith was developed which describes the properties of the near surface layer of a model comet nucleus at the macro and microscale with respect to textural, compositional, and geological properties. It consists of a multi-component system of fine-grained constituents forming a porous matrix (frozen volatiles and dust) and coarser grained, coherent inclusions of solid polycrystalline ice(s) and rock-like aggregates. A list of most probable phases is given. For simulation experiments and tests of spacecraft systems cometary analog materials are proposed which contain H2O, CO2, NH2, C, hydrocarbons such as asphalt or kerogen, and inorganic minerals like olivine, pyroxene, montmorillonite and kaolinite.
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