{"id":9459,"date":"2018-07-17T14:39:46","date_gmt":"2018-07-17T14:39:46","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9459"},"modified":"2018-08-20T11:07:39","modified_gmt":"2018-08-20T11:07:39","slug":"on-a-retrouve-un-morceau-de-lasteroide-2018-la","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/07\/17\/on-a-retrouve-un-morceau-de-lasteroide-2018-la\/","title":{"rendered":"On a retrouv\u00e9 un morceau de l’ast\u00e9ro\u00efde 2018 LA"},"content":{"rendered":"

Le 2 juin dernier, un petit ast\u00e9ro\u00efde de 2 m\u00e8tres, 2018 LA, a explos\u00e9 dans le ciel du Bostwana. Des chercheurs viennent d’en retrouver un premier fragment.<\/strong><\/p>\n

Le 2 juin 2018 de nombreux habitants du Bostwana et des pays voisins ont assist\u00e9 \u00e0 la d\u00e9sint\u00e9gration d’une m\u00e9t\u00e9orite lors de son entr\u00e9e dans l’atmosph\u00e8re. L’explosion de cet ast\u00e9ro\u00efde dans le ciel d’Afrique<\/a> a \u00e9galement \u00e9t\u00e9 enregistr\u00e9e par de nombreuses cam\u00e9ras de s\u00e9curit\u00e9. Quelques heures auparavant l’objet en question avait \u00e9t\u00e9 rep\u00e9r\u00e9 par le Catalina Sky Survey<\/em><\/a>, un r\u00e9seau de surveillance des ast\u00e9ro\u00efdes (et des com\u00e8tes comme\u00a0C \/ 2013 US10<\/a>) exploit\u00e9 par l’Universit\u00e9 de l’Arizona<\/a> et parrain\u00e9 par la NASA<\/a>.<\/p>\n

\"\"<\/a>
D\u00e9couverte d’un des fragments de l’ast\u00e9ro\u00efde 2018 LA. Cr\u00e9dit : Peter Jenniskens<\/figcaption><\/figure>\n

Apr\u00e8s l’explosion de l’ast\u00e9ro\u00efde (qui ne devait pas d\u00e9passer 2 m\u00e8tres), les fragments se sont dispers\u00e9s et sont retomb\u00e9s sur une vaste zone o\u00f9 la r\u00e9colte a commenc\u00e9 (tout comme en Russie apr\u00e8s la spectaculaire chute du 21 juin<\/a>).\u00a0<\/p>\n

Les calculs de la zone de chute des d\u00e9brits ont \u00e9t\u00e9 effectu\u00e9s ind\u00e9pendamment par deux \u00e9quipes, l’une aux \u00c9tats-Unis dirig\u00e9e par Peter Jenniskens<\/a>, un expert du SETI Institute<\/em><\/a> (auteur des images de l’article), ainsi que par Esko Lyytinen et Jarmo Moilanen du Finnish Fireball Network<\/em> (FFN) qui d\u00e9pend de l’Universit\u00e9 d’Helsinki<\/a>. La premi\u00e8re m\u00e9t\u00e9orite a \u00e9t\u00e9 d\u00e9couverte apr\u00e8s cinq jours de marche et de fouille par une \u00e9quipe compos\u00e9e de scientifiques et de g\u00e9ologues issus de diff\u00e9rentes universit\u00e9s du Bostwana, avec l’aide des gardes des parcs nationaux (la zone ratiss\u00e9e est une r\u00e9serve de chasse) et de Peter Jenniskens qui avait fait le voyage.<\/p>\n

\"\"<\/a>
Gros plan sur le premier\u00a0fragment de l’ast\u00e9ro\u00efde 2018 LA. Cr\u00e9dit : Peter Jenniskens<\/figcaption><\/figure>\n

Au Bostwana les m\u00e9t\u00e9orites sont prot\u00e9g\u00e9es par la loi et les \u00e9chantillons seront conserv\u00e9s par le Mus\u00e9e National du Botswana apr\u00e8s avoir \u00e9t\u00e9 \u00e9tudi\u00e9s par diff\u00e9rents chercheurs plac\u00e9s sous l’autorit\u00e9 du\u00a0Botswana Geoscience Institute<\/em> (BGI).<\/p>\n","protected":false},"excerpt":{"rendered":"

Le 2 juin dernier, un petit ast\u00e9ro\u00efde de 2 m\u00e8tres, 2018 LA, a explos\u00e9 dans le ciel du Bostwana. Des chercheurs viennent d’en retrouver un premier fragment. Le 2 juin 2018 de nombreux habitants du Bostwana et des pays voisins ont assist\u00e9 \u00e0 la d\u00e9sint\u00e9gration d’une m\u00e9t\u00e9orite lors de son entr\u00e9e dans l’atmosph\u00e8re. L’explosion de … Continuer la lecture de On a retrouv\u00e9 un morceau de l’ast\u00e9ro\u00efde 2018 LA<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":9460,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[2546,240,2547,2548],"class_list":["post-9459","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-2018-la","tag-asteroide","tag-bostwana","tag-peter-jenniskens"],"yoast_head":"\nOn a retrouv\u00e9 un morceau de l'ast\u00e9ro\u00efde 2018 LA<\/title>\n<meta name=\"description\" content=\"Le 2 juin dernier, un petit ast\u00e9ro\u00efde de 2 m\u00e8tres, 2018 LA, a explos\u00e9 dans le ciel du Bostwana. 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