Forced precession of the cometary nucleus with randomly placed active regions

Details Forced precession of the cometary nucleus with randomly placed active regions Forced precession of the cometary nucleus with randomly placed active regions

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..593s&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 593-596 (SEE N93-19113 06-90)

Mathematics

Comet Nuclei, Conductive Heat Transfer, Mathematical Models, Precession, Thermodynamics, Comets, Gas Jets, Orbits, Sublimation

Scientific paper

The cometary nucleus is assumed to be triaxial or axisymmetric spheroid rotating about its axis of maximum moment of inertia and is forced to precess due to jets of ejected material. Randomly placed regions of exposed ice on the surface of the nucleus are assumed to produce gas and dust. The solution of the heat conduction equation for each active region is used to find the gas sublimation rate and the jet acceleration. Precession of the comet nucleus is followed numerically using a phase-averaged system of equations. The gas production curves and the variation of the spin axis during the orbital motion of the comet are presented.

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