{"id":15399,"date":"2022-01-22T10:38:37","date_gmt":"2022-01-22T10:38:37","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=15399"},"modified":"2022-02-07T17:12:18","modified_gmt":"2022-02-07T17:12:18","slug":"lasteroide-2022-ae1-va-t-il-vraiment-heurter-la-terre-en-2023","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/01\/22\/lasteroide-2022-ae1-va-t-il-vraiment-heurter-la-terre-en-2023\/","title":{"rendered":"L&#8217;ast\u00e9ro\u00efde 2022 AE1 va-t-il vraiment heurter la Terre ?"},"content":{"rendered":"<p><strong>La NASA vient de classer 2022 AE1 en t\u00eate des ast\u00e9ro\u00efdes potentiellement dangereux. Faut-il vraiment s&#8217;en inqui\u00e9ter ?<\/strong><\/p>\n<h5>Un nouvel Apollon :<\/h5>\n<p>L&#8217;ast\u00e9ro\u00efde 2022 AE1 a \u00e9t\u00e9 rep\u00e9r\u00e9 pour la premi\u00e8re fois le 6 janvier 2022 \u00e0 1,3 million de kilom\u00e8tres de la Terre. La d\u00e9couverte a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le cadre du <a href=\"https:\/\/catalina.lpl.arizona.edu\/\" target=\"_blank\" rel=\"noopener\"><em>Catalina Sky\u00a0Survey<\/em><\/a>, un programme de recherche d&#8217;objets <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-geocroiseur-876\/\" target=\"_blank\" rel=\"noopener\">g\u00e9ocroiseurs<\/a>. Rapidement, la NASA a inscrit cet ast\u00e9ro\u00efde de 70 m\u00e8tres en t\u00eate de la liste des corps susceptibles de rencontrer la Terre :<\/p>\n<figure id=\"attachment_15400\" aria-describedby=\"caption-attachment-15400\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/asteroide1.jpg\" rel=\"lightbox[15399]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15400\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/asteroide1-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/asteroide1-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/asteroide1-768x432.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/asteroide1.jpg 960w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15400\" class=\"wp-caption-text\">Les g\u00e9ocroiseurs ont des orbites qui peuvent les amener \u00e0 rencontrer la Terre. \u00a9 iStock<\/figcaption><\/figure>\n<p>Pour classer la dangerosit\u00e9 des ast\u00e9ro\u00efdes, les astronomes utilisent l&#8217;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-echelle-turin-2506\/\" target=\"_blank\" rel=\"noopener\">\u00e9chelle de Turin<\/a>. Elle est gradu\u00e9e de 0 (aucun risque de collision) \u00e0 10 (collision in\u00e9vitable entra\u00eenant une catastrophe climatique). L&#8217;ast\u00e9ro\u00efde 2022 AE1 (un nouveau membre dans la famille des <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Ast%C3%A9ro%C3%AFde_Apollon\" target=\"_blank\" rel=\"noopener\">g\u00e9ocroiseurs Apollon<\/a>) est actuellement au niveau 1. Tous les autres g\u00e9ocroiseurs connus \u00e0 ce jour sont au niveau 0.\u00a0 <!--more--><\/p>\n<h5>Juin 1908, l&#8217;\u00e9v\u00e9nement de la Toungouska :<\/h5>\n<p>La rencontre th\u00e9orique avec 2022 AE1 est fix\u00e9e au mois de juillet 2023. Si elle se produisait, elle pourrait ressembler \u00e0 ce qui s&#8217;est pass\u00e9 le 30 juin 1908. Ce matin-l\u00e0, les paysans vivant sur les plateaux de <a href=\"https:\/\/www.futura-sciences.com\/planete\/actualites\/rechauffement-siberie-explosion-bulle-methane-cree-gouffre-50-m-profondeur-66800\/\" target=\"_blank\" rel=\"noopener\">Sib\u00e9rie<\/a> centrale ont sans doute cru que le ciel leur tombait sur la t\u00eate. Vers 7 heures, un objet trop brillant pour \u00eatre observ\u00e9 \u00e0 l\u2019\u0153il nu traversa le ciel avant de se d\u00e9sint\u00e9grer dans un bruit formidable :<\/p>\n<figure id=\"attachment_9382\" aria-describedby=\"caption-attachment-9382\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/06\/toungouska.jpg\" rel=\"lightbox[15399]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9382\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/06\/toungouska-450x230.jpg\" alt=\"\" width=\"450\" height=\"230\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/06\/toungouska-450x230.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/06\/toungouska-768x393.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/06\/toungouska.jpg 977w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9382\" class=\"wp-caption-text\">Carte montrant l\u2019ampleur de l\u2019\u00e9v\u00e9nement de la Toungouska le 30 juin 1908. En rouge, il s\u2019agit de la zone centrale de 40 km de diam\u00e8tre enti\u00e8rement d\u00e9vast\u00e9e. L\u2019orange correspond \u00e0 de forts d\u00e9g\u00e2ts \u00e0 100 km \u00e0 la ronde. En d\u00e9grad\u00e9 bleu, on peut visualiser la port\u00e9e du bruit g\u00e9n\u00e9r\u00e9 par l\u2019explosion. \u00a9 Wikip\u00e9dia<\/figcaption><\/figure>\n<p>L\u2019explosion fut entendue \u00e0 1.000 km de l\u00e0 et s\u2019accompagna d\u2019un s\u00e9isme de\u00a0<a href=\"https:\/\/www.futura-sciences.com\/planete\/definitions\/geologie-magnitude-intensite-4975\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> 5 que l\u2019on enregistra jusqu\u2019aux \u00c9tats-Unis. Des chasseurs furent projet\u00e9s en l\u2019air et tu\u00e9s \u00e0 moins de 20 km de l\u2019\u00e9picentre, des chiens et des rennes furent br\u00fbl\u00e9s vifs. On signala \u00e9galement des nomades jet\u00e9s \u00e0 terre \u00e0 40 km de l\u00e0, sans parler des 60 millions d\u2019arbres calcin\u00e9s ou couch\u00e9s comme des allumettes.<\/p>\n<h5>Pas de panique :<\/h5>\n<p>Pour 2022 AE1, nous n&#8217;en sommes pas l\u00e0. Les premi\u00e8res estimations montrent un risque minime de collision. De l&#8217;ordre de 1 sur 2.000, comme le rappelle le plan\u00e9tologue Franck Marchis sur sa <a href=\"https:\/\/www.facebook.com\/RealAllPlanets\" target=\"_blank\" rel=\"noopener\">page Facebook<\/a>. Dans les semaines \u00e0 venir, les grands t\u00e9lescopes fourniront de nouvelles mesures astrom\u00e9triques. Elles permettront d&#8217;affiner progressivement la trajectoire de ce nouveau petit corps c\u00e9leste.<\/p>\n<h5>Mise \u00e0 jour du 23 janvier :<\/h5>\n<p>Apr\u00e8s de nouvelles mesures, la NASA vient de r\u00e9trograder cet ast\u00e9ro\u00efde au niveau 0 sur l&#8217;\u00e9chelle de Turin. Il n&#8217;y a donc plus aucun risque de collision avec la Terre.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/09\/22\/2021-sg-linquietant-asteroide-que-personne-na-vu-arriver\/\" target=\"_blank\" rel=\"noopener\">2021 SG, l&#8217;inqui\u00e9tant ast\u00e9ro\u00efde que personne n&#8217;a vu arriver<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/03\/23\/interview-michel-ory-astronome-amateur-et-chasseur-de-cometes\/\" target=\"_blank\" rel=\"noopener\">Interview : Michel Ory, chasseur de com\u00e8tes (et d&#8217;ast\u00e9ro\u00efdes)<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/02\/24\/linstrument-sphere-devoile-la-surface-de-lasteroide-pallas\/\" target=\"_blank\" rel=\"noopener\">L&#8217;instrument SPHERE d\u00e9voile la surface de l&#8217;ast\u00e9ro\u00efde Pallas<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>\u00a0ou\u00a0<a href=\"https:\/\/twitter.com\/cielmania\" target=\"_blank\" rel=\"noopener noreferrer\">Twitter<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>La NASA vient de classer 2022 AE1 en t\u00eate des ast\u00e9ro\u00efdes potentiellement dangereux. Faut-il vraiment s&#8217;en inqui\u00e9ter ? Un nouvel Apollon : L&#8217;ast\u00e9ro\u00efde 2022 AE1 a \u00e9t\u00e9 rep\u00e9r\u00e9 pour la premi\u00e8re fois le 6 janvier 2022 \u00e0 1,3 million de kilom\u00e8tres de la Terre. La d\u00e9couverte a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le cadre du Catalina Sky\u00a0Survey, &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/01\/22\/lasteroide-2022-ae1-va-t-il-vraiment-heurter-la-terre-en-2023\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">L&#8217;ast\u00e9ro\u00efde 2022 AE1 va-t-il vraiment heurter la Terre ?<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":15402,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3161,594,2533],"class_list":["post-15399","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-asteroide-2022-ae1","tag-geocroiseur","tag-toungouska"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>L&#039;ast\u00e9ro\u00efde 2022 AE1 va-t-il vraiment heurter la Terre ?<\/title>\n<meta name=\"description\" content=\"La NASA vient de classer 2022 AE1 en t\u00eate des ast\u00e9ro\u00efdes potentiellement dangereux. 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