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Active Asteroids in the NEO Population

Published online by Cambridge University Press:  01 March 2016

Peter Jenniskens
Peter Jenniskens*
Affiliation:
SETI Institute, 189 Bernardo Ave, Mountain View, CA 94043, USA email: petrus.m.jenniskens@nasa.gov
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Abstract

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Some main-belt asteroids evolve into near-Earth objects. They can then experience the same meteoroid-producing phenomena as active asteroids in the main belt. If so, they would produce meteoroid streams, some of which evolve to intersect Earth's orbit and produce meteor showers at Earth. Only few of those are known. Meteoroid streams that move in orbits with Tisserand parameter well in excess of 3 are the Geminids and Daytime Sextantids of the Phaethon complex and the lesser known epsilon Pegasids. The observed activity appears to be related to nearly whole scale disintegrations, rather than dust ejection from volatile outgassing as observed in active comets. There is only a small population of asteroids with a main-belt origin that recently disintegrated into meteoroid streams.

Keywords

meteorsmeteoroidscomets: generalminor planetsasteroids
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 91 - 98
Copyright
Copyright © International Astronomical Union 2016 

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