Active Asteroids in the NEO Population. Issue Volume 10:Issue S318(2015) (1st March 2016)

• Record Type: Journal Article
• Authors: Jenniskens, Peter
• Editors: Chesley, S. R.; Morbidelli, A.; Jedicke, R.; Farnocchia, D.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 10:Issue S318(2015)
• Page Start: 91
• Page End: 98
• Publication Date: 2016-03-01
• Subjects: meteors, -- meteoroids, -- comets: general, -- minor planets, -- asteroids; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921315009631
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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.