Meteor showers from known long-period comets
Autor: | Peter S. Gural, Peter Jenniskens, Martin C. Towner, Steve Heathcote, Carl Johannink, Tim Beck, Mohammad Odeh, Steve Rau, Dante S. Lauretta, Jim Albers, Toni Hanke, Martin Breukers, Marcelo De Cicco, Dave Samuels, Tim Cooper, Luke Juneau, Nicholas Moskovitz, Jack Baggaley, J. Andreas Howell, Emmanuel Jehin |
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Rok vydání: | 2021 |
Předmět: |
Meteor (satellite)
education.field_of_study 010504 meteorology & atmospheric sciences Meteoroid Population Comet Astronomy Astronomy and Astrophysics Orbital period 01 natural sciences Longitude of the periapsis Orbit Space and Planetary Science 0103 physical sciences education Meteor shower 010303 astronomy & astrophysics Geology 0105 earth and related environmental sciences |
Zdroj: | Icarus. 365:114469 |
ISSN: | 0019-1035 |
Popis: | What long-period comets with orbital periods >250 years cause detectable meteor showers on Earth? Low-light video cameras are used to track the motion of +4 to −5 magnitude meteors in our atmosphere by triangulation and calculate the meteoroid orbit in space. In recent years, the CAMS (Cameras for Allsky Meteor Surveillance) low-light video camera network was greatly expanded and, together with other video networks, now has increased the total video meteoroid orbit database to over 2.2 million orbits. Here, we searched this database for meteor showers associated with known long-period comets. Previously, five associations were known. Now, we find 14, as well as six uncertain but likely associations. These showers show a change of longitude of perihelion with node that is a strong function of inclination. Showers of longer duration show a steeper magnitude distribution index, presumably due to aging of the meteoroid population. Showers are generally detected only if the orbital period of the comet is less than 4000 years and the Earth-Comet orbital miss distance is ≤0.10 AU. The lack of an associated meteor shower sets lower limits on the orbital period of poorly observed comets. |
Databáze: | OpenAIRE |
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