LINK<\/strong><\/a><\/p>\n\n\n\n“Highlights<\/p>\n\n\n\n
\u2022 Video meteoroid orbit surveys now have increased the number of known meteor showers with long-period comet parent bodies from 5 to 14.<\/p>\n\n\n\n
\u2022 Showers are detected only if the comet orbit has an orbital period less than 4000\u202fyears and passes to within about 0.01\u202fAU from Earth’s orbit.<\/p>\n\n\n\n
\u2022 Long-period comet meteor showers are significantly dispersed in solar longitude, radiant, and speed.<\/p>\n\n\n\n
\u2022 The change of longitude of perihelion with solar longitude is a strong function of inclination.<\/p>\n\n\n\n
\u2022 More dispersed (older) meteor showers show a steeper magnitude distrubution index.”<\/p>\n\n\n\n
“What long-period comets with orbital periods >250\u202fyears cause detectable meteor showers on Earth? Low-light video cameras are used to track the motion of +4 to \u22125 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\u202fyears and the Earth-Comet orbital miss distance is \u22640.10\u202fAU. The lack of an associated meteor shower sets lower limits on the orbital period of poorly observed comets.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Peter Jenniskens, Dante S. Lauretta, Martin C. Towner, Steve Heathcote, Steve Heathcote, Emmanuel Jehin, Toni Hanke, Tim Cooper, Jack W. Baggaley, J. Andreas Howell, Carl Johannink, Martin Breukers, Mohammad Odeh, Nicholas Moskovitz, Luke Juneau, Tim…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[179,96,71],"tags":[5866,98,4490],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27395"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27395"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27395\/revisions"}],"predecessor-version":[{"id":27397,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27395\/revisions\/27397"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}