{"id":18732,"date":"2023-12-07T17:08:07","date_gmt":"2023-12-07T17:08:07","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=18732"},"modified":"2023-12-11T17:52:50","modified_gmt":"2023-12-11T17:52:50","slug":"loccultation-de-betelgeuse-sannonce-exceptionnelle","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/12\/07\/loccultation-de-betelgeuse-sannonce-exceptionnelle\/","title":{"rendered":"L&#8217;occultation de B\u00e9telgeuse s&#8217;annonce exceptionnelle"},"content":{"rendered":"<p><strong>Le spectacle d&#8217;une vie : c&#8217;est ce que vont vivre les astronomes qui auront fait le d\u00e9placement pour observer l&#8217;occultation de B\u00e9telgeuse.<\/strong><\/p>\n<h5>Une occultation tr\u00e8s rare :<\/h5>\n<p>B\u00e9telgeuse (<em>\u03b1 Orionis<\/em>), principale \u00e9toile de la\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/03\/23\/en-images-la-majestueuse-constellation-dorion\/\" target=\"_blank\" rel=\"noopener\">constellation d\u2019Orion<\/a>, va s\u2019\u00e9teindre un court instant le 12 d\u00e9cembre. La faute \u00e0 (319) Leona, un ast\u00e9ro\u00efde de la <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-ceinture-asteroides-6358\/\" target=\"_blank\" rel=\"noopener\">ceinture principale<\/a>. L&#8217;occultation, qui devrait durer une dizaine de secondes, sera exceptionnelle. Il est en effet extr\u00eamement rare d&#8217;assister \u00e0 l&#8217;extinction d&#8217;une \u00e9toile brillante par un ast\u00e9ro\u00efde. On peut citer les occultations de <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-regulus-5080\/\" target=\"_blank\" rel=\"noopener\">R\u00e9gulus<\/a> (<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> 1,4) en 2005 et 2014. Mais pour la superg\u00e9ante rouge B\u00e9telgeuse (magnitude 0,6), ce sera une premi\u00e8re :<\/p>\n<figure id=\"attachment_18733\" aria-describedby=\"caption-attachment-18733\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse.jpg\" rel=\"lightbox[18732]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18733\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/betelgeuse.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18733\" class=\"wp-caption-text\">B\u00e9telgeuse marque l&#8217;\u00e9paule du chasseur Orion un soir de Lune. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Un ph\u00e9nom\u00e8ne observable \u00e0 l&#8217;\u0153il nu par tous, encore plus rare qu&#8217;une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/06\/30\/30-juin-1973-soleil-noir-a-bord-du-concorde\/\" target=\"_blank\" rel=\"noopener\">\u00e9clipse totale de Soleil<\/a> ! C&#8217;est pourquoi la <a href=\"https:\/\/saf-astronomie.fr\/loccultation-de-betelgeuse-par-lasteroide-319-leona-le-12-decembre-2023\/\" target=\"_blank\" rel=\"noopener\">SAF<\/a> et le <a href=\"https:\/\/lesia.obspm.fr\/\" target=\"_blank\" rel=\"noopener\">LESIA<\/a> ont d\u00e9cid\u00e9 d&#8217;associer astronomes amateurs et professionnels pour \u00e9tudier cette occultation.\u00a0<!--more--><\/p>\n<h5>\u03b1 Orionis en vedette :<\/h5>\n<p>En g\u00e9n\u00e9ral, l&#8217;observation d&#8217;une occultation d&#8217;\u00e9toile par un ast\u00e9ro\u00efde a pour but de caract\u00e9riser ce dernier. Mais le 12 d\u00e9cembre, c&#8217;est <em>\u03b1 Orionis<\/em> qui int\u00e9ressera les astronomes (les mensurations de (319) Leona \u00e9tant connues, environ 70X58 km). C&#8217;est ce qu&#8217;explique l&#8217;astronome Josselin Desmars de l&#8217;<a href=\"https:\/\/www.imcce.fr\/news\/betelgeuse-leona\" target=\"_blank\" rel=\"noopener\">IMCCE<\/a> : &#8220;<em>\u03b1 Orionis est une g\u00e9ante rouge qui devrait exploser en supernova d\u2019ici quelques milliers d\u2019ann\u00e9es. Il y a \u00e0 sa surface des <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-convection-hors-norme-betelgeuse-23272\/\" target=\"_blank\" rel=\"noopener\">cellules convectives<\/a> gigantesques, ce qui int\u00e9resse tout particuli\u00e8rement <a href=\"https:\/\/lesia.obspm.fr\/perso\/miguel-montarges\/index.html\" target=\"_blank\" rel=\"noopener\">Miguel Montarg\u00e8s<\/a>, avec lequel nous coordonnons cette campagne d\u2019observation&#8230; L\u2019int\u00e9r\u00eat de cette occultation est d\u2019obtenir des informations sur la surface de l\u2019\u00e9toile et d\u2019appr\u00e9hender la localisation de ces cellules&#8230; L\u2019observation elle-m\u00eame consistera \u00e0 enregistrer des images \u00e0 haute fr\u00e9quence pour obtenir une courbe de lumi\u00e8re d\u00e9taill\u00e9e du ph\u00e9nom\u00e8ne.<\/em>&#8221;<\/p>\n<figure id=\"attachment_14778\" aria-describedby=\"caption-attachment-14778\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion.jpg\" rel=\"lightbox[18732]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14778\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/09\/orion.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-14778\" class=\"wp-caption-text\">La c\u00e9l\u00e8bre constellation d&#8217;Orion, joyau des nuits hivernales. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Comme c&#8217;est le cas pour une \u00e9clipse de Soleil, les astronomes devront choisir le bon endroit pour jouir du spectacle. L&#8217;occultation sera visible le long d\u2019une bande passant par le Sud de l\u2019Espagne et de l\u2019Italie. Ceux qui auront le privil\u00e8ge d&#8217;\u00eatre sur place devraient vivre une nuit palpitante, \u00e0 condition que le ciel soit d\u00e9gag\u00e9 !<\/p>\n<p><strong>Pour toutes les informations concernant cette occultation, consultez <a href=\"https:\/\/www.imcce.fr\/news\/betelgeuse-leona\" target=\"_blank\" rel=\"noopener\">la page de l&#8217;IMCCE<\/a>. Pour suivre le ph\u00e9nom\u00e8ne en direct, rendez-vous sur <a href=\"https:\/\/www.virtualtelescope.eu\/2023\/12\/04\/the-extremely-rare-betelgeuse-occultation-by-asteroid-319-leona-online-event-12-dec-2023\/\" target=\"_blank\" rel=\"noopener\">la page du VirtualTelescope<\/a>.<\/strong><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/03\/16\/conseils-realisez-votre-premiere-photo-de-la-nebuleuse-dorion\/\" target=\"_blank\" rel=\"noopener\">Comment r\u00e9aliser votre premi\u00e8re photo de la n\u00e9buleuse d\u2019Orion<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/10\/30\/ciel-aux-jumelles-guide-decouvrir-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">Le Ciel aux jumelles, un guide pour d\u00e9couvrir le ciel nocturne<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/05\/05\/la-constellation-dorion-se-couche-depuis-les-iles-andaman\/\" target=\"_blank\" rel=\"noopener\">La constellation d\u2019Orion se couche depuis les \u00eeles Andaman<\/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>.<\/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>Le spectacle d&#8217;une vie : c&#8217;est ce que vont vivre les astronomes qui auront fait le d\u00e9placement pour observer l&#8217;occultation de B\u00e9telgeuse. Une occultation tr\u00e8s rare : B\u00e9telgeuse (\u03b1 Orionis), principale \u00e9toile de la\u00a0constellation d\u2019Orion, va s\u2019\u00e9teindre un court instant le 12 d\u00e9cembre. La faute \u00e0 (319) Leona, un ast\u00e9ro\u00efde de la ceinture principale. L&#8217;occultation, &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/12\/07\/loccultation-de-betelgeuse-sannonce-exceptionnelle\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">L&#8217;occultation de B\u00e9telgeuse s&#8217;annonce exceptionnelle<\/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":18743,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3493,344,354,1600,3494,3496,3495,106,3328],"class_list":["post-18732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-319-leona","tag-betelgeuse","tag-constellation-dorion","tag-imcce","tag-josselin-desmars","tag-lesia","tag-miguel-montarges","tag-occultation","tag-saf"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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