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Origin and Evolution of Recent Leonid Meteor Showers*

Published online by Cambridge University Press:  12 April 2016

Bruce A. McIntosh
Bruce A. McIntosh*
Affiliation:
National Research Council of CanadaOttawa, Ontario

Abstract

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The four most prominent returns of the Leonid shoiver in the past decade fall into two broad classes. The 1966 and 1969 showers were of short duration, had a high proportion of small particles, and occurred with the longest apparent delay after the perihelion passage of the parent comet Temple-Tuttle. By contrast, the 1961 and 1965 returns were of long duration, and had more large particles. The 1961 return preceded the comet.

There are three major influences on particle orbits: ejection velocity, radiation pressure, and close encounters with planets. The observations are explainable in a qualitative way on the basis of the first two. But some speculation concerning the results of planetary perturbations must be invoked.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 13: Evolutionary and Physical Properties of Meteoroids , June 1971 , pp. 193 - 198
Copyright
Copyright © NASA 1971

Footnotes

*

The author has discovered an error in his calculations that modifies the results as presented at the symposium. This paper is a revised version.

References

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