{"id":21291,"date":"2025-06-18T15:44:31","date_gmt":"2025-06-18T15:44:31","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=21291"},"modified":"2025-07-13T09:03:30","modified_gmt":"2025-07-13T09:03:30","slug":"la-brillante-nova-v462-lupi-est-desormais-visible-a-loeil-nu","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/06\/18\/la-brillante-nova-v462-lupi-est-desormais-visible-a-loeil-nu\/","title":{"rendered":"La brillante nova V462 Lupi est d\u00e9sormais visible \u00e0 l&#8217;\u0153il nu"},"content":{"rendered":"<p><strong>Les astronomes suivent avec int\u00e9r\u00eat l&#8217;augmentation d&#8217;\u00e9clat de la nova V462 Lupi, d\u00e9couverte dans la constellation du Loup le 12 juin.<\/strong><\/p>\n<h5>Nova en vue sur l&#8217;horizon Sud :<\/h5>\n<p>V462 Lupi a \u00e9t\u00e9 d\u00e9couverte par l&#8217;un des t\u00e9lescopes automatiques du r\u00e9seau de surveillance <a href=\"https:\/\/www.astronomy.ohio-state.edu\/asassn\/index.shtml\" target=\"_blank\" rel=\"noopener\">ASAS-SN<\/a> le 12 juin. \u00c0 cette date, la nova avait une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de 8,7. Depuis, son \u00e9clat ne cesse d&#8217;augmenter et elle est d\u00e9sormais visible \u00e0 l&#8217;\u0153il nu. Elle a d&#8217;ailleurs \u00e9t\u00e9 photographi\u00e9e par plusieurs amateurs :<a href=\"https:\/\/www.facebook.com\/photo?fbid=3608079902666485&amp;set=pcb.3608080095999799\" target=\"_blank\" rel=\"noopener\"> Tomio Akutsu<\/a>, <a href=\"https:\/\/www.facebook.com\/photo?fbid=24218042291137180&amp;set=a.108915725809840\" target=\"_blank\" rel=\"noopener\">Christopher Go<\/a> ou encore <a href=\"https:\/\/spaceweathergallery2.com\/indiv_upload.php?upload_id=223638\" target=\"_blank\" rel=\"noopener\">Dawid Mo\u017adzierski<\/a>. Je vous invite \u00e0 retrouver cartes et infos dans l&#8217;article propos\u00e9 par <a href=\"https:\/\/skyandtelescope.org\/astronomy-news\/bright-nova-lights-up-lupus\/\" target=\"_blank\" rel=\"noopener\">Sky &amp; Telescope<\/a> :<\/p>\n<figure id=\"attachment_21292\" aria-describedby=\"caption-attachment-21292\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1.jpg\" rel=\"lightbox[21291]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21292\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1-450x270.jpg\" alt=\"Un horizon Sud tr\u00e8s d\u00e9gag\u00e9 est indispensable pour pointer la nova du Loup. \u00a9 Stellarium\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova1.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21292\" class=\"wp-caption-text\">Un horizon Sud tr\u00e8s d\u00e9gag\u00e9 est indispensable pour pointer la nova du Loup. \u00a9 Stellarium<\/figcaption><\/figure>\n<p>Comme la nova se situe dans la constellation australe du Loup, il est pr\u00e9f\u00e9rable de l&#8217;observer depuis les basses latitudes. J&#8217;ai obtenu la carte ci-dessus sur <a href=\"https:\/\/stellarium-web.org\/\" target=\"_blank\" rel=\"noopener\">Stellarium<\/a> en choisissant de placer l&#8217;observateur \u00e0 Marseille. Ci-dessous, je vous propose un champ plus r\u00e9duit pour localiser la nova :<\/p>\n<figure id=\"attachment_21293\" aria-describedby=\"caption-attachment-21293\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2.jpg\" rel=\"lightbox[21291]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21293\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2-450x259.jpg\" alt=\"\" width=\"450\" height=\"259\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2-450x259.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2-1024x589.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2-768x442.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/06\/nova2.jpg 1061w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21293\" class=\"wp-caption-text\">Carte de rep\u00e9rage aux jumelles de la nova du Loup. \u00a9 Stellarium<\/figcaption><\/figure>\n<p>Mais qu&#8217;est-ce qu&#8217;une nova ? L&#8217;astrophysicien <a href=\"https:\/\/blogs.futura-sciences.com\/luminet\/2015\/03\/24\/une-nova-dans-le-sagittaire\/\" target=\"_blank\" rel=\"noopener\">Jean-Pierre Luminet<\/a> nous explique que ce ph\u00e9nom\u00e8ne lumineux implique un transfert de mati\u00e8re entre deux astres, une g\u00e9ante rouge et une naine blanche. Lorsque leurs mouvements orbitaux les rapprochent, la naine blanche arrache de la mati\u00e8re \u00e0 sa voisine et devient beaucoup plus lumineuse : on parle alors de <a href=\"http:\/\/www.astronomie-amateur.fr\/Variables%20Cataclysmiques.html\" target=\"_blank\" rel=\"noopener\">variable cataclysmique<\/a>. Ce ph\u00e9nom\u00e8ne cyclique devrait par exemple se manifester prochainement sur <a href=\"https:\/\/www.lemonde.fr\/sciences\/article\/2024\/06\/27\/t-coronae-borealis-l-etoile-qui-va-exploser-pour-la-enieme-fois_6244769_1650684.html\" target=\"_blank\" rel=\"noopener\">T Coronae Borealis (T CrB)<\/a> dont on attend toujours l&#8217;explosion. <!--more--><\/p>\n<h5>Une c\u00e9l\u00e8bre supernova\u00a0 dans le Loup :<\/h5>\n<p>Rappelons que la constellation du Loup fut le th\u00e9\u00e2tre d&#8217;une formidable explosion de <a href=\"https:\/\/www.in2p3.cnrs.fr\/fr\/supernova#:~:text=Supernovas%20%3A%20c'est%20le%20nom,de%20ses%20propres%20forces%20gravitationnelles.\" target=\"_blank\" rel=\"noopener\">supernova<\/a> en l&#8217;an 1006. Il faut dire que l&#8217;astre atteignit la magnitude de -7 et\u00a0 fut visible \u00e0 l\u2019\u0153il nu pendant pr\u00e8s de trois mois. Le ph\u00e9nom\u00e8ne est d&#8217;ailleurs rapport\u00e9 dans les chroniques du philosophe et scientifique m\u00e9di\u00e9val persan Avicenne.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1.jpg\" rel=\"lightbox[21291]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5619\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1-450x281.jpg\" alt=\"\" width=\"450\" height=\"281\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1-450x281.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1-768x480.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1-1024x640.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/sn-1.jpg 1440w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les restes de cette gigantesque explosion cosmique furent retrouv\u00e9s dans le milieu des ann\u00e9es 1960 par les radioastronomes. La supernova a laiss\u00e9 un r\u00e9manent visible sur l\u2019image ci-dessus r\u00e9alis\u00e9e par le <a href=\"http:\/\/chandra.harvard.edu\/photo\/2008\/sn1006c\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope Chandra<\/a>. Maintenant, essayez de rep\u00e9rer V462 Lupi sur l&#8217;horizon Sud \u00e0 l&#8217;aide d&#8217;une paire de jumelles ou d&#8217;un t\u00e9lescope. Mais d\u00e9p\u00eachez-vous : ces sursauts d&#8217;\u00e9clat spectaculaires ne durent que quelques jours !<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/\" target=\"_blank\" rel=\"noopener\">Peut-on choisir son premier t\u00e9lescope sans se tromper ?<\/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\/2023\/11\/13\/les-yeux-de-hibou-detonnantes-jumelles\/\" target=\"_blank\" rel=\"noopener\">Les \u201cYeux de hibou\u201d, d\u2019\u00e9tonnantes jumelles<\/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>\u00a0et sur\u00a0<a href=\"https:\/\/bsky.app\/profile\/cielmania.bsky.social\" target=\"_blank\" rel=\"noopener\">Bluesky<\/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>Les astronomes suivent avec int\u00e9r\u00eat l&#8217;augmentation d&#8217;\u00e9clat de la nova V462 Lupi, d\u00e9couverte dans la constellation du Loup le 12 juin. Nova en vue sur l&#8217;horizon Sud : V462 Lupi a \u00e9t\u00e9 d\u00e9couverte par l&#8217;un des t\u00e9lescopes automatiques du r\u00e9seau de surveillance ASAS-SN le 12 juin. \u00c0 cette date, la nova avait une magnitude de &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/06\/18\/la-brillante-nova-v462-lupi-est-desormais-visible-a-loeil-nu\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La brillante nova V462 Lupi est d\u00e9sormais visible \u00e0 l&#8217;\u0153il nu<\/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":21292,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[1268,921,3538,3780],"class_list":["post-21291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-constellation-du-loup","tag-nova","tag-stellarium","tag-v462-lupi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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