{"id":95743,"date":"2025-02-28T14:13:05","date_gmt":"2025-02-28T14:13:05","guid":{"rendered":"https:\/\/www.africa-press.net\/cotedivoire\/politique\/le-risque-dimpact-sur-terre-de-lasteroide-2024-yr4-desormais-proche-de-zero"},"modified":"2025-02-28T14:13:05","modified_gmt":"2025-02-28T14:13:05","slug":"le-risque-dimpact-sur-terre-de-lasteroide-2024-yr4-desormais-proche-de-zero","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cotedivoire\/toutes-les-actualites\/le-risque-dimpact-sur-terre-de-lasteroide-2024-yr4-desormais-proche-de-zero","title":{"rendered":"Le risque d’impact sur Terre de l’ast\u00e9ro\u00efde 2024 YR4 d\u00e9sormais proche de z\u00e9ro"},"content":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. <\/strong><\/span>Le risque d’un impact sur Terre en 2032 de l’aste\u0301roi\u0308de 2024 YR4 est de\u0301sormais proche de ze\u0301ro, selon les calculs de l’Agence spatiale europe\u0301enne (ESA), annonce\u0301s le 25 fe\u0301vrier 2025 dans un communique\u0301. L\u2019aste\u0301roi\u0308de, susceptible de de\u0301vaster e\u0301ventuellement une ville, avait e\u0301tabli un record de risque d’impact, en atteignant re\u0301cemment 3,1%, selon la Nasa et 2,8% selon l’ESA.<\/p>\n

Les plus re\u0301centes observations de sa trajectoire, effectue\u0301es a\u0300 l’aide de te\u0301lescopes, excluent de\u0301sormais quasiment tout sce\u0301nario catastrophe, avec un risque d’impact de 0,001%, soit une chance sur 100.000 de frapper la Terre.<\/p>\n

Une trajectoire malgre\u0301 tout suivie<\/b><\/p>\n

De\u0301couvert en de\u0301cembre, 2024 YR4 a une taille estime\u0301e entre 40 et 90 me\u0300tres de large. Les premiers calculs de sa trajectoire faisaient courir un risque d’impact avec la Terre le 22 de\u0301cembre 2032. Classe\u0301 initialement au niveau 3 de l’e\u0301chelle des risques d’impact Torino, conc\u0327ue par la Nasa, et qui s’e\u0301chelonne de ze\u0301ro a\u0300 dix, l’aste\u0301roi\u0308de est redescendu au niveau ze\u0301ro, selon l’ESA.<\/p>\n

L’agence europe\u0301enne a remarque\u0301 que les observations de l’aste\u0301roi\u0308de \u00ab\u00a0ont suivi un mode\u0300le bien connu\u00a0\u00bb, dans lequel la probabilite\u0301 d’un impact s’e\u0301le\u0300ve d’abord avant de tomber rapidement a\u0300 ze\u0301ro avec des observations additionnelles.<\/p>\n

Malgre\u0301 cela, et comme tous les aste\u0301roi\u0308des remarquables, la trajectoire de 2024 YR4 sera suivie dans les mois qui viennent gra\u0302ce au te\u0301lescope spatial James Webb. Son orbite va ensuite l’e\u0301loigner conside\u0301rablement de la Terre jusqu’a\u0300 un retour en 2028 qui rendra sa course de nouveau observable.<\/p>\n

Un pre\u0301ce\u0301dent avec Apophis<\/b><\/p>\n

Le dernier aste\u0301roi\u0308de faisant plus de 30 me\u0300tres de large et susceptible de percuter la plane\u0300te bleue e\u0301tait Apophis. De\u0301tecte\u0301 en 2004, il avait brie\u0300vement fait peser un risque d’impact en 2029, avant que cette probabilite\u0301 ne soit re\u0301duite a\u0300 ze\u0301ro.<\/p>\n

Pour autant, les scientifiques travaillent depuis des anne\u0301es au de\u0301veloppement de moyens de de\u0301fense plane\u0301taire contre un tel risque. En 2022, une mission de la Nasa a re\u0301ussi a\u0300 de\u0301vier la trajectoire d’un aste\u0301roi\u0308de inoffensif en envoyant un vaisseau s’e\u0301craser dessus.<\/p>\n

Pour plus d’informations et d’analyses sur la C\u00f4te d’Ivoire<\/span>, suivez Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. Le risque d’un impact sur Terre en 2032 de l’aste\u0301roi\u0308de 2024 YR4 est de\u0301sormais proche de ze\u0301ro, selon les calculs de l’Agence spatiale europe\u0301enne (ESA), annonce\u0301s le 25 fe\u0301vrier 2025 dans un communique\u0301. L\u2019aste\u0301roi\u0308de, susceptible de de\u0301vaster e\u0301ventuellement une ville, avait e\u0301tabli un record de risque d’impact, en atteignant re\u0301cemment 3,1%, […]<\/p>\n","protected":false},"author":82,"featured_media":95742,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37],"class_list":["post-95743","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-cote-divoire-2"],"yoast_head":"\nLe risque d'impact sur Terre de l'ast\u00e9ro\u00efde 2024 YR4 d\u00e9sormais proche de z\u00e9ro - C\u00f4te d'Ivoire<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/cotedivoire\/politique\/le-risque-dimpact-sur-terre-de-lasteroide-2024-yr4-desormais-proche-de-zero\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le risque d'impact sur Terre de l'ast\u00e9ro\u00efde 2024 YR4 d\u00e9sormais proche de z\u00e9ro\" \/>\n<meta property=\"og:description\" content=\"Africa-Press – C\u00f4te d’Ivoire. Le risque d’un impact sur Terre en 2032 de l’aste\u0301roi\u0308de 2024 YR4 est de\u0301sormais proche de ze\u0301ro, selon les calculs de l’Agence spatiale europe\u0301enne (ESA), annonce\u0301s le 25 fe\u0301vrier 2025 dans un communique\u0301. 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