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Dynamic and Probabilistic Relation between Meteoroids and their Parent Bodies

Published online by Cambridge University Press:  27 February 2018

Lars G. Adolfsson  and
Bo Å. S. Gustafson
Lars G. Adolfsson
Affiliation:
Department of Astronomy, PO Box 112055, University of Florida, Gainesville, Florida 32611-2055, USA
Bo Å. S. Gustafson
Affiliation:
Department of Astronomy, PO Box 112055, University of Florida, Gainesville, Florida 32611-2055, USA

Abstract

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We estimate the probability that specific meteoroids were produced by a specific parent body and obtain the ejection velocity and several other conditions of the ejection as a by-product. The duration of cometary activity leading to a meteor stream, or the epoch of a collision can be estimated from the ejection times of meteoroids in the same stream. The level of activity of a comet or probability of asteroid collisions can be estimated from the part of the orbit where ejection took place. We show that Phaethon ejected Geminid meteoroids over at least 3000 years lasting to as recently as ≈ AD 1600. Ejections are predominantly in the direction of the sun, i.e., from Phaethon's day side, and give insights into the ejection process which is suggestive of cometary activity. Our calculations account for the uncertainty in the observational data and include the effects of planetary perturbations, radiation pressure, Poynting-Robertson light drag and solar wind corpuscular drag.

Type
III. Meteoroid Streams
Information
International Astronomical Union Colloquium , Volume 150: Physics, Chemistry and Dynamics of Interplanetary Dust , 1996 , pp. 133 - 136
Copyright
Copyright © Astronomical Society of the Pacific 1996

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