{"id":727,"date":"2012-06-21T07:48:00","date_gmt":"2012-06-21T05:48:00","guid":{"rendered":"https:\/\/kids.esa.int\/a_near_miss_predicted_for_asteroid_2011_ag5\/"},"modified":"2026-10-08T00:31:36","modified_gmt":"2026-10-07T22:31:36","slug":"a_near_miss_predicted_for_asteroid_2011_ag5","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/a_near_miss_predicted_for_asteroid_2011_ag5\/","title":{"rendered":"L'ast\u00e9ro\u00efde 2011 AG5 devrait \u00e9viter la Terre en 2040"},"content":{"rendered":"<div class=\"lede\">\n<p>Tout le monde pourra dormir un peu plus tranquille cette nuit. Les derni\u00e8res observations d'un gros ast\u00e9ro\u00efde fr\u00f4lant la Terre \u2013 connu sous le nom d'ast\u00e9ro\u00efde 2011 AG5 \u2013 indiquent qu'il passera sans danger pr\u00e8s de notre plan\u00e8te en 2040.<\/p>\n<\/div>\n<p>Il y a 65 millions d\u2019ann\u00e9es, un ast\u00e9ro\u00efde a provoqu\u00e9 l\u2019extinction des dinosaures. Contrairement \u00e0 nous, ces reptiles au sang froid ne disposaient pas d\u2019instruments de surveillance pour \u00e9valuer les risques d'impact avec la Terre. Leur extinction \u00e9tait par cons\u00e9quent in\u00e9vitable.<\/p>\n<p>Fort heureusement, la technologie moderne permet de d\u00e9tecter tout objet stellaire potentiellement dangereux. Un t\u00e9lescope sp\u00e9cial, install\u00e9 en Arizona, a \u00e9t\u00e9 le premier \u00e0 observer l\u2019ast\u00e9ro\u00efde 2011 AG5 en janvier de l\u2019ann\u00e9e derni\u00e8re. Plusieurs observatoires ont ensuite analys\u00e9 pendant neuf mois cet ast\u00e9ro\u00efde, d\u2019environ 140 m\u00e8tres, avant qu\u2019il ne s\u2019\u00e9loigne irr\u00e9m\u00e9diablement.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"724\" data-credit=\"NASA\/JPL-Caltech\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/06\/Orbit_and_location_of_asteroid_2011_AG5_as_of_15_June_20122\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2012\/06\/orbit_and_location_of_asteroid_2011_ag5_as_of_15_june_20122\/17899200-2-eng-GB\/Orbit_and_location_of_asteroid_2011_AG5_as_of_15_June_2012.jpg\" alt=\"Orbit and location of asteroid 2011 AG5 as of 15 June 2012\"><figcaption>Orbite et position de l'ast\u00e9ro\u00efde 2011 AG5 au 15 juin 2012<\/figcaption><\/figure>\n<p>Les observations se sont ensuite av\u00e9r\u00e9es plus difficiles car 2011 AG5 a quitt\u00e9 l\u2019orbite de Mars avant de passer de l\u2019autre c\u00f4t\u00e9 du Soleil. Cependant, \u00e0 l\u2019automne 2013, les conditions d\u2019observation (aussi bien au sol que dans l\u2019espace) devraient nous permettre de mieux suivre sa trajectoire. L\u2019ast\u00e9ro\u00efde se trouvera alors \u00e0 147 millions de kilom\u00e8tres de la Terre, mais nous pourrons cependant l\u2019observer dans le ciel nocturne.<\/p>\n<p>Les informations dont nous disposons actuellement nous permettent de penser que 2011 AG5 ne va pas percuter la Terre en 2040. Les experts internationaux, y compris les chercheurs de l\u2019ESA, sont persuad\u00e9s que les prochaines technologies d\u2019observation vont confirmer cette tendance. Si le risque perdure, il nous restera suffisamment de temps pour organiser une mission visant \u00e0 changer la trajectoire de l\u2019ast\u00e9ro\u00efde.<\/p>","protected":false},"excerpt":{"rendered":"<p>Everyone can sleep a little better tonight. The latest observations of a large, Earth-grazing space rock &#8211; known as asteroid 2011 AG5 &#8211; suggest that it will fly safely past [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2011\/10\/lutetia_at_closest_approach2\/17872225-2-eng-GB\/Lutetia_at_Closest_approach.jpg","esa_banner_description":"Lutetia at Closest approach","esa_banner_credit":"ESA 2010 MPS for OSIRIS Team MPS\/UPD\/LAM\/IAA\/RSSD\/INTA\/UPM\/DASP\/IDA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2011\/10\/Lutetia_at_Closest_approach2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-727","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/727","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=727"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/727\/revisions"}],"predecessor-version":[{"id":4653,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/727\/revisions\/4653"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=727"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=727"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=727"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=727"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=727"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=727"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=727"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}