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Nongravitational Effects on Comets: the Current Status

Published online by Cambridge University Press:  14 August 2015

B. G. Marsden
B. G. Marsden*
Affiliation:
Smithsonian Astrophysical Observatory, Cambridge, Mass., U.S.A.

Abstract

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A method for allowing for the effects of nongravitational forces on the motions of comets is summarized. Study of the motions of specific comets indicates that these forces act essentially continuously but have a high inverse dependence on heliocentric distance; there is also evidence for secular changes. The equations of motion employed are discussed in terms of the Whipple icyconglomerate model. Nongravitational parameters are tabulated for all 46 comets observed at three or more perihelion passages. We point out the particular problems that still exist for certain comets and suggest directions for future research.

Type
Part III/Motions of the Short-Period Comets
Information
Symposium - International Astronomical Union , Volume 45: The Motion, Evolution of Orbits and Origin of Comets , 1972 , pp. 135 - 143
Copyright
Copyright © Reidel 1972 

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