{"id":36847,"date":"2024-10-21T23:59:34","date_gmt":"2024-10-21T21:59:34","guid":{"rendered":"https:\/\/karmaka.de\/?p=36847"},"modified":"2024-10-22T09:07:46","modified_gmt":"2024-10-22T07:07:46","slug":"ab-initio-strewn-field-for-small-asteroids-impacts","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36847","title":{"rendered":"Ab initio strewn field for small asteroids impacts<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Albino Carbognani, Marco Fenucci, Raffaele Salerno, Marco Micheli<\/p>\n\n\n\n<p>Icarus<br>Available online 21 October 2024, 116345<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0019103524004056\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/2410.15823\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul>\n<li>Strewn field computation for small asteroid from orbital data only, without fireball triangulation.<\/li>\n\n\n\n<li>Ab initio strewn field for 2023 CX1, 2024 BX1 and 2008 TC3 fall and comparison with recovered meteorites.<\/li>\n\n\n\n<li>Fast determination of the strewn field of small asteroid for meteorite search.<\/li>\n\n\n\n<li>Possible strewn fields for 2022 WJ1 fall.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;In recent years, nine small near-Earth asteroids were discovered a few hours before the collision with the Earth: these are about one meter in diameter objects that have all disintegrated in the atmosphere, generating bright fireballs without causing damage. In some cases, several meteorites have been recovered. In cases like these, it is not always possible to triangulate the fireball generated by the asteroid\u2019s fall to circumscribe the strewn field position. For this reason, it can be important to compute a strewn field \u201cab initio\u201d, i.e. propagating the asteroid\u2019s trajectory in the atmosphere starting from the initial conditions obtained directly from the heliocentric orbit, coupled with some reasonable hypothesis about the mean strength and the mass of the fragments to \u201csample\u201d the strewn field. By adopting a simple fragmentation model coupled with a real atmospheric profile, useful results can be obtained to locate the strewn field, as we will show for the recent falls of asteroids 2024 BX1, 2023 CX1 and 2008 TC3. It was possible to locate the strewn field of our study cases with an uncertainty of the order of one kilometre with the mean strength in the range 0.5\u20135 MPa and the mass of the possible final fragments in the 1 g\u20131 kg range. We have also verified that a pancake phase after fragmentation is unnecessary to locate the strewn field for a small asteroid fall.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Albino Carbognani, Marco Fenucci, Raffaele Salerno, Marco Micheli IcarusAvailable online 21 October 2024, 116345 LINK PDF (OPEN ACCESS) &#8220;Highlights &#8220;In recent years, nine small near-Earth asteroids were discovered a few hours before the collision with&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,96,176,6616,6519,97,47],"tags":[460,6736,6601,1837,1869,3683,6615,6518,1301,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36847"}],"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=36847"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36847\/revisions"}],"predecessor-version":[{"id":36851,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36847\/revisions\/36851"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}