{"id":27519,"date":"2021-04-24T09:18:24","date_gmt":"2021-04-24T07:18:24","guid":{"rendered":"https:\/\/karmaka.de\/?p=27519"},"modified":"2021-05-14T12:03:51","modified_gmt":"2021-05-14T10:03:51","slug":"the-impact-and-recovery-of-asteroid-2018-la","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=27519","title":{"rendered":"The impact and recovery of asteroid 2018 LA<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p class=\"justify-text\">Peter Jenniskens, Mohutsiwa Gabadirwe, Qing\u2010Zhu Yin, Alexander Proyer, Oliver Moses, Tomas Kohout, Fulvio Franchi, Roger L. Gibson, Richard Kowalski, Eric J. Christensen, Alex R. Gibbs, Aren Heinze, Larry Denneau, Davide Farnocchia, Paul W. Chodas, William Gray, Marco Micheli, Nick Moskovitz, Christopher A. Onken, Christian Wolf, Hadrien A. R. Devillepoix, Quanzhi Ye, Darrel K. Robertson, Peter Brown, Esko Lyytinen, Jarmo Moilanen, Jim Albers, Tim Cooper, Jelle Assink, L\u00e4slo Evers, Panu Lahtinen, Lesedi Seitshiro, Matthias Laubenstein, Nggie Wantlo, Phemo Moleje, Joseph Maritinkole, Heikki Suhonen, Michael E. Zolensky, Lewis Ashwal, Takahiro Hiroi, Derek W. Sears, Alexander Sehlke, Alessandro Maturilli, Matthew E. Sanborn, Magdalena H. Huyskens, Supratim Dey, Karen Ziegler, Henner Busemann, My E. I. Riebe, Matthias M. M. Meier, Kees C. Welten, Marc W. Caffee, Qin Zhou, Qiu\u2010Li Li, Xian\u2010Hua Li, Yu Liu, Guo\u2010Qiang Tang, Hannah L. McLain, Jason P. Dworkin, Daniel P. Glavin, Philippe Schmitt\u2010Kopplin, Hassan Sabbah, Christine Joblin, Mikael Granvik, Babutsi Mosarwa, Koketso Botepe<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>First published: 23 April 2021<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13653\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13653\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/arxiv.org\/ftp\/arxiv\/papers\/2105\/2105.05997.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The June 2, 2018 impact of asteroid 2018 LA over Botswana is only the second asteroid detected in space prior to impacting over land. Here, we report on the successful recovery of meteorites. Additional astrometric data refine the approach orbit and define the spin period and shape of the asteroid. Video observations of the fireball constrain the asteroid&#8217;s position in its orbit and were used to triangulate the location of the fireball&#8217;s main flare over the Central Kalahari Game Reserve. Twenty\u2010three meteorites were recovered. A consortium study of eight of these classifies Motopi Pan as an HED polymict breccia derived from howardite, cumulate and basaltic eucrite, and diogenite lithologies. Before impact, 2018 LA was a solid rock of ~156 cm diameter with high bulk density ~2.85 g cm\u22123, a relatively low albedo pV ~ 0.25, no significant opposition effect on the asteroid brightness, and an impact kinetic energy of ~0.2 kt. The orbit of 2018 LA is consistent with an origin at Vesta (or its Vestoids) and delivery into an Earth\u2010impacting orbit via the \u03bd6 resonance. The impact that ejected 2018 LA in an orbit toward Earth occurred 22.8 \u00b1 3.8 Ma ago. Zircons record a concordant U\u2010Pb age of 4563 \u00b1 11 Ma and a consistent 207Pb\/206Pb age of 4563 \u00b1 6 Ma. A much younger Pb\u2010Pb phosphate resetting age of 4234 \u00b1 41 Ma was found. From this impact chronology, we discuss what is the possible source crater of Motopi Pan and the age of Vesta&#8217;s Veneneia impact basin.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Peter Jenniskens, Mohutsiwa Gabadirwe, Qing\u2010Zhu Yin, Alexander Proyer, Oliver Moses, Tomas Kohout, Fulvio Franchi, Roger L. Gibson, Richard Kowalski, Eric J. Christensen, Alex R. Gibbs, Aren Heinze, Larry Denneau, Davide Farnocchia, Paul W. Chodas, William&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,34,96,5929,186,47],"tags":[5930,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27519"}],"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=27519"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27519\/revisions"}],"predecessor-version":[{"id":27725,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27519\/revisions\/27725"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}