Comet thermal modeling

Details Comet thermal modeling Comet thermal modeling

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept...66w&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 66-68 (SEE N87-23341 16-91)

Physics

Geophysics

Astronomical Models, Halley'S Comet, Heat Transmission, Molecular Clouds, Surface Properties, Monte Carlo Method, Oort Cloud, Radiative Transfer, Satellite Imagery, Thermal Stresses

Scientific paper

The past year was one of tremendous activity because of the appearance of Halley's Comet. Observations of the comet were collected from a number of sources and compared with the detailed predictions of the comet thermal modeling program. Spacecraft observations of key physical parameters for cometary nucleus were incorporated into the thermal model and new cases run. These results have led to a much better understanding of physical processes on the nucleus and have pointed the way for further improvements to the modeling program. A model for the large-scale structure of cometary nuclei was proposed in which comets were envisioned as loosely bound agglomerations of smaller icy planetesimals, essentially a rubble pile of primordial dirty snowballs. In addition, a study of the physical history of comets was begun, concentrating on processes during formation and in the Oort cloud which would alter the volatile and nonvolatile materials in cometary nuclei from their pristine state before formation.

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