The shape, topography, and geology of Tempel 1 from Deep Impact observations

Details The shape, topography, and geology of Tempel 1 from Deep Impact observations The shape, topography, and geology of Tempel 1 from Deep Impact observations

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..187....4t&link_type=abstract

Icarus, Volume 187, Issue 1, p. 4-15.

Physics

55

Scientific paper

Deep Impact images of the nucleus of Comet Tempel 1 reveal pervasive layering, possible impact craters, flows with smooth upper surfaces, and erosional stripping of material. There are at least 3 layers 50 200 m thick that appear to extend deep into the nucleus, and several layers 1 20 m thick that parallel the surface and are being eroded laterally. Circular depressions show geographical variation in their forms and suggest differences in erosion rates or style over scales >1 km. The stratigraphic arrangement of these features suggests that the comet experienced substantial periods of little erosion. Smooth surfaces trending downslope suggest some form of eruption of materials from this highly porous object. The Deep Impact images show that the nucleus of Tempel 1 cannot be modeled simply as either an onion-layer or rubble pile structure.

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