{"id":3732,"date":"2015-10-01T04:54:32","date_gmt":"2015-10-01T04:54:32","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=3732"},"modified":"2015-10-08T05:07:26","modified_gmt":"2015-10-08T05:07:26","slug":"dans-lhemisphere-sud-la-comete-catalina-fait-son-show","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/01\/dans-lhemisphere-sud-la-comete-catalina-fait-son-show\/","title":{"rendered":"Dans l&#8217;h\u00e9misph\u00e8re sud, la com\u00e8te Catalina fait son show"},"content":{"rendered":"<p><strong>La com\u00e8te Catalina va-t-elle devenir visible \u00e0 l&#8217;\u0153il nu ? Personne ne peut en \u00eatre certain mais les astronomes de l&#8217;h\u00e9misph\u00e8re sud restent optimistes.<\/strong><\/p>\n<p>D\u00e9couverte le 31 octobre 2013 \u00e0 la magnitude 19 par un t\u00e9lescope automatis\u00e9 de 68 cm de diam\u00e8tre dans le cadre du <em><a href=\"http:\/\/www.lpl.arizona.edu\/css\/\" target=\"_blank\">Catalina Sky Survey<\/a><\/em>, la com\u00e8te C \/ 2013 US10 Catalina n&#8217;a cess\u00e9 d&#8217;augmenter d&#8217;\u00e9clat tout en s&#8217;approchant de nous : elle \u00e9tait de magnitude 12 en mai 2015 et de magnitude 8 trois mois plus tard.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/jqGtUfauKAM\" frameborder=\"0\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : Hedgehog, le robot explorateur de com\u00e8tes<\/strong><\/p>\n<p>La com\u00e8te Catalina pourrait devenir visible \u00e0 l&#8217;\u0153il nu dans le courant du mois d&#8217;octobre et briller \u00e0 la magnitude 5 en novembre, lorsqu&#8217;elle passera au plus pr\u00e8s du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/14\/15-images-pour-detailler-un-lever-de-soleil\/\" target=\"_blank\">Soleil <\/a>(le 15 novembre \u00e0 une distance de 0,82 Unit\u00e9 Astronomique soit 120 millions de km).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/09\/comet_catalina.jpg\" rel=\"lightbox[3732]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3735\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/09\/comet_catalina-450x298.jpg\" alt=\"comet_catalina\" width=\"450\" height=\"298\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/09\/comet_catalina-450x298.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/09\/comet_catalina-1024x678.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/09\/comet_catalina.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Malheureusement pour nous cette com\u00e8te circulera dans le ciel de l&#8217;h\u00e9misph\u00e8re sud jusqu&#8217;\u00e0 la mi-d\u00e9cembre ; elle remontera ensuite vers les cieux nordiques mais son \u00e9clat aura beaucoup diminu\u00e9.<\/p>\n<p><!--more-->Sur cette image de <a href=\"http:\/\/www.astrobin.com\/users\/PepeChambo\/\" target=\"_blank\">Jos\u00e9 J. Chamb\u00f3<\/a> r\u00e9alis\u00e9e le 17 septembre dernier \u00e0 l&#8217;aide d&#8217;une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/05\/bien-choisir-sa-premiere-lunette-astronomique\/\" target=\"_blank\">lunette astronomique<\/a> de 106 mm de diam\u00e8tre depuis Siding Spring en Australie, la com\u00e8te C \/ 2013 US10 \u00a0Catalina a une magnitude de 6,5 ce qui la rend observable \u00e0 l&#8217;aide d&#8217;une paire de jumelles. La com\u00e8te se trouve pr\u00e8s de l&#8217;\u00e9toile <em>Alpha Lupi<\/em>, la plus brillante\u00a0de la constellation du Loup .<\/p>\n<p>La coma (ou chevelure) qui entoure le noyau pr\u00e9sente une forte \u00e9mission verd\u00e2tre de C2 (carbone diatomique). Quant \u00e0 la queue de poussi\u00e8re elle s&#8217;\u00e9tire sur un peu plus de 1,5\u00b0 et se perd dans la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/10\/voie-lactee-et-bioluminescence-dans-le-sud-de-laustralie\/\" target=\"_blank\">Voie lact\u00e9e<\/a> en bas de l&#8217;image .<\/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 com\u00e8te Catalina va-t-elle devenir visible \u00e0 l&#8217;\u0153il nu ? Personne ne peut en \u00eatre certain mais les astronomes de l&#8217;h\u00e9misph\u00e8re sud restent optimistes. D\u00e9couverte le 31 octobre 2013 \u00e0 la magnitude 19 par un t\u00e9lescope automatis\u00e9 de 68 cm de diam\u00e8tre dans le cadre du Catalina Sky Survey, la com\u00e8te C \/ 2013 US10 &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/01\/dans-lhemisphere-sud-la-comete-catalina-fait-son-show\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Dans l&#8217;h\u00e9misph\u00e8re sud, la com\u00e8te Catalina fait son show<\/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":3735,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[686,1267,1268,1266,1269,166],"class_list":["post-3732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-australie","tag-comete-c2013-us10-catalina","tag-constellation-du-loup","tag-jose-j-chambo","tag-siding-spring","tag-voie-lactee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dans l&#039;h\u00e9misph\u00e8re sud, la com\u00e8te Catalina fait son show<\/title>\n<meta name=\"description\" content=\"La com\u00e8te Catalina va-t-elle devenir visible \u00e0 l&#039;\u0153il nu ? 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