{"id":1735,"date":"2015-01-27T07:08:44","date_gmt":"2015-01-27T07:08:44","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1735"},"modified":"2015-02-03T06:02:32","modified_gmt":"2015-02-03T06:02:32","slug":"une-lune-pour-lasteroide-2004-bl86","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/27\/une-lune-pour-lasteroide-2004-bl86\/","title":{"rendered":"Une lune pour l\u2019ast\u00e9ro\u00efde 2004 BL86\u00a0!"},"content":{"rendered":"<p>D\u00e9couvert en 2004 (ce qui explique sa num\u00e9rotation) par un <a title=\"Feu vert pour le t\u00e9lescope g\u00e9ant E-ELT\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/13\/feu-vert-pour-le-telescope-geant-e-elt\/\" target=\"_blank\">t\u00e9lescope <\/a>automatique, l&#8217;ast\u00e9ro\u00efde 2004 BL86 est pass\u00e9 au plus pr\u00e8s de la Terre (1,2 million de km tout de m\u00eame, soit environ trois fois la distance Terre-<a title=\"Le retour du croissant de Lune\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/22\/le-retour-du-croissant-de-lune\/\" target=\"_blank\">Lune<\/a>) hier en fin de journ\u00e9e.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/asteroide.jpg\" rel=\"lightbox[1735]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1737\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/asteroide-450x399.jpg\" alt=\"asteroide\" width=\"450\" height=\"399\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/asteroide-450x399.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/asteroide.jpg 900w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les images obtenues par le radar de <a title=\"Goldstone Radar\" href=\"http:\/\/gssr.jpl.nasa.gov\/\" target=\"_blank\">Goldstone <\/a>ont permis de d\u00e9terminer la taille exacte de ce corps (environ 325 m de diam\u00e8tre) mais ont surtout r\u00e9v\u00e9l\u00e9 la pr\u00e9sence d&#8217;une petite lune de 70 m de diam\u00e8tre qui accompagne <a title=\"Cabu, Charb, Tignous et Wolinski, des noms d\u2019ast\u00e9ro\u00efdes\u00a0?\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/16\/cabu-charb-tignous-et-wolinski-des-noms-asteroides\/\" target=\"_blank\">l&#8217;ast\u00e9ro\u00efde<\/a>.<\/p>\n<p><!--more-->Ce ph\u00e9nom\u00e8ne n&#8217;est pas exceptionnel selon la NASA\u00a0: environ 16% des <a title=\"L\u2019ast\u00e9ro\u00efde Vesta cartographi\u00e9\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/22\/lasteroide-vesta-cartographie\/\" target=\"_blank\">ast\u00e9ro\u00efdes <\/a>de plus de 200 m de diam\u00e8tre qui ont d\u00e9j\u00e0 \u00e9t\u00e9 \u00e9tudi\u00e9s sont accompagn\u00e9s d&#8217;une ou deux lunes.<\/p>\n<p>Hier soir c&#8217;\u00e9tait la premi\u00e8re fois qu&#8217;un <a title=\"Mascot, prochain robot sur un ast\u00e9ro\u00efde\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/02\/mascot-prochain-robot-asteroide\/\" target=\"_blank\">ast\u00e9ro\u00efde <\/a>de cette dimension passait aussi pr\u00e8s de nous\u00a0: 2004 BL86 a travers\u00e9 le ciel \u00e0 raison de 2 degr\u00e9s\/heure avec une magnitude de 9, ce qui a permis de l&#8217;observer dans une simple paire de jumelles comme un petit point lumineux se d\u00e9pla\u00e7ant lentement au milieu des <a title=\"La statue et les \u00e9toiles\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/06\/17\/statue-les-etoiles\/\" target=\"_blank\">\u00e9toiles<\/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>D\u00e9couvert en 2004 (ce qui explique sa num\u00e9rotation) par un t\u00e9lescope automatique, l&#8217;ast\u00e9ro\u00efde 2004 BL86 est pass\u00e9 au plus pr\u00e8s de la Terre (1,2 million de km tout de m\u00eame, soit environ trois fois la distance Terre-Lune) hier en fin de journ\u00e9e. Les images obtenues par le radar de Goldstone ont permis de d\u00e9terminer la &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/27\/une-lune-pour-lasteroide-2004-bl86\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Une lune pour l\u2019ast\u00e9ro\u00efde 2004 BL86\u00a0!<\/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":1738,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[798,89,82,192,486,451,799,96],"class_list":["post-1735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-asteroide-2004-bl86","tag-etoile","tag-lune","tag-magnitude","tag-nasa","tag-paire-de-jumelles","tag-radar-de-goldstone","tag-telescope"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Une lune pour l\u2019ast\u00e9ro\u00efde 2004 BL86\u00a0!<\/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:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/27\/une-lune-pour-lasteroide-2004-bl86\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une lune pour l\u2019ast\u00e9ro\u00efde 2004 BL86\u00a0!\" \/>\n<meta property=\"og:description\" content=\"D\u00e9couvert en 2004 (ce qui explique sa num\u00e9rotation) par un t\u00e9lescope automatique, l&#8217;ast\u00e9ro\u00efde 2004 BL86 est pass\u00e9 au plus pr\u00e8s de la Terre (1,2 million de km tout de m\u00eame, soit environ trois fois la distance Terre-Lune) hier en fin de journ\u00e9e. 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