Deep Impact: Excavating Comet Tempel 1

Details Deep Impact: Excavating Comet Tempel 1 Deep Impact: Excavating Comet Tempel 1

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sci...310..258a&link_type=abstract

Science, Volume 310, Issue 5746, pp. 258-264 (2005).

Computer Science

313

Scientific paper

Deep Impact collided with comet Tempel 1, excavating a crater controlled by gravity. The comet's outer layer is composed of 1- to 100-micrometer fine particles with negligible strength (<65 pascals). Local gravitational field and average nucleus density (600 kilograms per cubic meter) are estimated from ejecta fallback. Initial ejecta were hot (>1000 kelvins). A large increase in organic material occurred during and after the event, with smaller changes in carbon dioxide relative to water. On approach, the spacecraft observed frequent natural outbursts, a mean radius of 3.0 +/- 0.1 kilometers, smooth and rough terrain, scarps, and impact craters. A thermal map indicates a surface in equilibrium with sunlight.

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