{"id":9869,"date":"2016-12-02T13:15:59","date_gmt":"2016-12-02T13:15:59","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/lamas-ouvert-ngc-2158\/"},"modified":"2025-06-08T22:45:36","modified_gmt":"2025-06-08T20:45:36","slug":"lamas-ouvert-ngc-2158","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/lamas-ouvert-ngc-2158\/","title":{"rendered":"L’amas ouvert NGC 2158"},"content":{"rendered":"

Bonjour,
\nLes conditions \u00e9taient difficiles ce mardi 29 novembre \u00e0 La Fosse en raison d’un bise d’est soutenue et d’une temp\u00e9rature bien n\u00e9gative, le thermom\u00e8tre \u00e9tant rapidement descendu \u00e0 -6\u00b0C d\u00e8s la nuit tomb\u00e9e.
\nJ’ai n\u00e9anmoins r\u00e9ussi \u00e0 faire quelques captures avec la ST10 au foyer r\u00e9duit du C11.
\nVoici donc l’amas ouvert NGC 2158. Cet amas se trouve dans les G\u00e9meaux et il est en apparence voisin de M 35, mais est en r\u00e9alit\u00e9 beaucoup plus loin. Si la distance est estim\u00e9e \u00e0 3.200 AL pour M 35, elle est de 11.000 ann\u00e9es lumi\u00e8re pour NGC 2158. Par ailleurs, NGC 2158 est assez vieux puisque son \u00e2ge est estim\u00e9 \u00e0 environ 2 milliards d’ann\u00e9es, ce qui explique sa couleur g\u00e9n\u00e9rale plut\u00f4t rouge pour un amas ouvert.
\n12 poses de 3 minutes en bin 2 pour les couches rvb ont \u00e9t\u00e9 combin\u00e9es \u00e0 59 poses de 1 minute captur\u00e9es en bin 1 pour la luminance soit au total un temps de pose cumul\u00e9 de 2 heures 47 minutes.<\/p>\n

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

J-Luc<\/p>\n\n\n

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\n Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Bonjour, Les conditions \u00e9taient difficiles ce mardi 29 novembre \u00e0 La Fosse en raison d’un bise d’est soutenue et d’une temp\u00e9rature bien n\u00e9gative, le thermom\u00e8tre \u00e9tant rapidement descendu \u00e0 -6\u00b0C d\u00e8s la nuit tomb\u00e9e. J’ai n\u00e9anmoins r\u00e9ussi \u00e0 faire quelques captures avec la ST10 au foyer r\u00e9duit du C11. Voici donc l’amas ouvert NGC 2158. […]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-9869","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9869","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=9869"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9869\/revisions"}],"predecessor-version":[{"id":11822,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9869\/revisions\/11822"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9869"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9869"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}