Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-26T16:36:12.212Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

Guth, V., 1968. Perturbations of the line of nodes of the Leonids during the years 1866-1966, in Physics and Dynamics of Meteors, edited by Kresák, L. and Millman, P. M., D. Reidel Publ. Co., Dordrecht, Holland, 476–480.Google Scholar
Kazimirčak-Polonskaja, E. I., Beljaev, N. A., Astapovic, I. S., and Tebenteva, A. K., 1968. Investigation of perturbed motion of the Leonid meteor stream, in Physics and Dynamics of Meteors, edited by Kresák, L. and Millman, P. M., D. Reidel Publ. Co., Dordrecht, Holland, 449–475.Google Scholar
Mabsden, B. G., 1968. Reports on the progress of astronomy, Comets, Quart. J. Roy. Astron. Soc, 9, 304–321.Google Scholar
McIntosh, B. A., 1970. Radar observations of the 1969 Leonid meteor shower, Bull. Radio and Elect. Eng. Div., N.R.C. Can., 20, No. 2, 30–33.Google Scholar
McIntosh, B. A., and Millman, P. M., 1970. The Leonids by radar—1957 to 1968, Meteoritics, 5, 1–18.CrossRefGoogle Scholar
Whipple, F. L., 1951. A comet model. II. Physical relations for comets and meteors, Astrophys. J., 113, 464–474.Google Scholar