Thermal Modeling of Rosetta Flyby Asteroid 21 Lutetia

Details Thermal Modeling of Rosetta Flyby Asteroid 21 Lutetia Thermal Modeling of Rosetta Flyby Asteroid 21 Lutetia

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufm.p13c1402w&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #P13C-1402

Physics

[6055] Planetary Sciences: Comets And Small Bodies / Surfaces, [6205] Planetary Sciences: Solar System Objects / Asteroids

Scientific paper

We have developed an advanced thermal model for cometary nuclei and asteroids that solves the complete 3-dimensional heat flow problem within the body. The model is capable simulating spherical, prolate, or oblate spheroids. We applied the model to the case of asteroid 21 Lutetia prior to the Rosetta spacecraft flyby on July 10, 2010 in order to aid initial interpretation of thermal data from Rosetta's instruments. Preliminary results suggest that the surface of Lutetia has a very low thermal inertia, indicative of a thick, insulating regolith. Using additional results from the Rosetta flyby, we will present a post-encounter thermal model, simulating the asteroid as a prolate spheroid. This work was supported by the NASA U.S. Rosetta Program and by the NASA Post-doctoral Program. It was performed at the Jet Propulsion Laboratory under contract with NASA.

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