{"id":2767,"date":"2015-05-11T05:04:03","date_gmt":"2015-05-11T05:04:03","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2767"},"modified":"2015-05-31T07:56:42","modified_gmt":"2015-05-31T07:56:42","slug":"un-avion-de-ligne-passe-devant-le-soleil-tache","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/11\/un-avion-de-ligne-passe-devant-le-soleil-tache\/","title":{"rendered":"Un avion de ligne passe devant le Soleil tach\u00e9"},"content":{"rendered":"

Alors que je photographiais le beau groupe de taches solaires AR 2339<\/a> dans la soir\u00e9e du 10 mai, un avion de ligne est pass\u00e9 entre moi et notre \u00e9toile.<\/p>\n

\"tache_solaire_avion\"<\/a><\/p>\n

Le Soleil <\/a>(comme la Lune<\/a>) ayant un diam\u00e8tre apparent d’environ 1\/2\u00b0, il arrive que des avions passent tr\u00e8s pr\u00e8s ou m\u00eame devant le disque de cet astre.<\/p>\n

Pour avoir la chance de photographier un tel transit, il faut commencer par rep\u00e9rer les principaux couloirs a\u00e9riens et attendre que le Soleil <\/a>les traverse.<\/p>\n

Ensuite tout est affaire de patience : en multipliant les temps de surveillance de notre \u00e9toile on augmente logiquement la probabilit\u00e9 d’une telle observation. Il faut \u00eatre pr\u00eat \u00e0 d\u00e9clencher si un avion appara\u00eet devant le Soleil, son passage \u00e9tant rapide. Parfois l’avion est suivi d’une tra\u00een\u00e9e de condensation, en anglais contrail<\/em><\/a>.<\/p>\n

L’image ci-dessus a \u00e9t\u00e9 prise avec un bo\u00eetier Finepix HS 20, zoom de 720 mm de focale (prot\u00e9g\u00e9 par des filtres ND 400 + ND 8), 100 iso, pose de 1\/3000e de sec, f\/d=11.<\/p>\n

Les astrophotographes les plus exp\u00e9riment\u00e9s vont m\u00eame jusqu’\u00e0 traquer les transits de l’ISS<\/a> devant le Soleil.<\/p>\n","protected":false},"excerpt":{"rendered":"

Alors que je photographiais le beau groupe de taches solaires AR 2339 dans la soir\u00e9e du 10 mai, un avion de ligne est pass\u00e9 entre moi et notre \u00e9toile. Le Soleil (comme la Lune) ayant un diam\u00e8tre apparent d’environ 1\/2\u00b0, il arrive que des avions passent tr\u00e8s pr\u00e8s ou m\u00eame devant le disque de cet … Continuer la lecture de Un avion de ligne passe devant le Soleil tach\u00e9<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":2769,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1022,120,122,97,261],"class_list":["post-2767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-ar-2339","tag-avion","tag-contrail","tag-soleil","tag-tache-solaire"],"yoast_head":"\nUn avion de ligne passe devant le Soleil tach\u00e9<\/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\/05\/11\/un-avion-de-ligne-passe-devant-le-soleil-tache\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un avion de ligne passe devant le Soleil tach\u00e9\" \/>\n<meta property=\"og:description\" content=\"Alors que je photographiais le beau groupe de taches solaires AR 2339 dans la soir\u00e9e du 10 mai, un avion de ligne est pass\u00e9 entre moi et notre \u00e9toile. 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