{"id":2525,"date":"2015-04-15T04:54:11","date_gmt":"2015-04-15T04:54:11","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2525"},"modified":"2015-04-22T04:53:39","modified_gmt":"2015-04-22T04:53:39","slug":"liss-passe-entre-persee-et-cassiopee","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/04\/15\/liss-passe-entre-persee-et-cassiopee\/","title":{"rendered":"L’ISS passe entre Pers\u00e9e et Cassiop\u00e9e"},"content":{"rendered":"

Tout le monde n’est pas Ralf Vandeberg<\/a>, cet astronome amateur n\u00e9erlandais qui photographie avec son t\u00e9lescope l’ISS<\/a> (la Station spatiale internationale) sous toutes ses coutures. Mais gr\u00e2ce au site Heavens Above<\/em><\/a>, chacun peut conna\u00eetre les instants de passage de la Station et sa trajectoire devant les constellations.<\/p>\n

\"iss2\"<\/a><\/p>\n

Il suffit alors d’\u00eatre dehors quelques minutes avant l’heure pr\u00e9vue et de lever les yeux pour voir circuler lentement dans le ciel l’ISS comme un point lumineux non clignotant dont l’\u00e9clat est \u00e9quivalent \u00e0 celui de la plan\u00e8te Jupiter<\/a>.<\/p>\n

L’image ci-dessus a \u00e9t\u00e9 r\u00e9alis\u00e9e le 12 avril lors d’un passage de la Station \u00e0 21h45. La trace de l’ISS trahit son d\u00e9placement pendant la pose photographique de 5 secondes (la Station circule \u00e0 28 000 km\/h \u00e0 une altitude d’environ 400 km), d\u00e9placement entre les constellations de Pers\u00e9e et de Cassiop\u00e9e <\/a>(cette derni\u00e8re a une forme caract\u00e9ristique en W), \u00e0 proximit\u00e9 du radiant des Pers\u00e9ides<\/a>.<\/p>\n

On peut aussi noter la pr\u00e9sence du double amas de Pers\u00e9e, NGC 884 et NGC 869, deux amas ouverts d’\u00e9toiles comparables \u00e0 ceux de la Cr\u00e8che ou des Pl\u00e9iades <\/a>mais plus lointains.<\/p>\n

Essayez vous aussi de photographier l’ISS lors d’un de ses prochains passages avec un objectif de courte focale (ici un 50 mm ouvert \u00e0 f\/1,8) et une sensibilit\u00e9 \u00e9lev\u00e9e (1600 iso pour cette image) de fa\u00e7on \u00e0 r\u00e9v\u00e9ler l’aspect du ciel \u00e9toil\u00e9 et retrouver la forme des constellations.<\/p>\n","protected":false},"excerpt":{"rendered":"

Tout le monde n’est pas Ralf Vandeberg, cet astronome amateur n\u00e9erlandais qui photographie avec son t\u00e9lescope l’ISS (la Station spatiale internationale) sous toutes ses coutures. Mais gr\u00e2ce au site Heavens Above, chacun peut conna\u00eetre les instants de passage de la Station et sa trajectoire devant les constellations. Il suffit alors d’\u00eatre dehors quelques minutes avant … Continuer la lecture de L’ISS passe entre Pers\u00e9e et Cassiop\u00e9e<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":2526,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[134,401,171,89,196],"class_list":["post-2525","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-amas-ouvert","tag-constellation-de-cassiopee","tag-constellation-de-persee","tag-etoile","tag-iss"],"yoast_head":"\nL'ISS passe entre Pers\u00e9e et Cassiop\u00e9e<\/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\/04\/15\/liss-passe-entre-persee-et-cassiopee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L'ISS passe entre Pers\u00e9e et Cassiop\u00e9e\" \/>\n<meta property=\"og:description\" content=\"Tout le monde n’est pas Ralf Vandeberg, cet astronome amateur n\u00e9erlandais qui photographie avec son t\u00e9lescope l’ISS (la Station spatiale internationale) sous toutes ses coutures. 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