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3.5 The Dust Coma of Comets

Published online by Cambridge University Press:  12 April 2016

K.W. Michel  and
T. Nishimura
K.W. Michel
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, 8046 Garching München
T. Nishimura
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, 8046 Garching München

Abstract

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Analytical expressions for the dust entrainment in the limits of low and high gas production from cometary nuclei are derived. The resulting volume density is used to evaluate the dust production of Comets Encke and Kohoutek from IR-measurements. It is predicted, that the dust in solar direction was diffuse for Comet Kohoutek during approach to the Sun, but sharp for Comet Encke and nearly independent of heliocentric distance. The dust production rate of Encke ist not sufficient to sustain the Zodiacal cloud of micron sized particles. Particle impact probabilities and hazards are estimated for a space probe in a fly-by mission to Encke.

Information

Type
3 Cometary Dust
Information
International Astronomical Union Colloquium , Volume 31: Interplanetary Dust and Zodiacal Light , 1976 , pp. 328 - 333
Copyright
Copyright © Springer-Verlag 1976

References

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