{"id":8147,"date":"2006-05-20T17:15:58","date_gmt":"2006-05-20T17:15:58","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/m13-entre-deux-averses\/"},"modified":"2025-06-16T22:59:20","modified_gmt":"2025-06-16T20:59:20","slug":"m13-entre-deux-averses","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/m13-entre-deux-averses\/","title":{"rendered":"M13 entre deux averses…"},"content":{"rendered":"

Auteur: Alain Schmitz (schmitz_a@swing.be)<\/p>\n

Bonjour,<\/p>\n

J’ai r\u00e9ussi \u00e0 photographier le c\u00e9l\u00e8bre amas d’Hercule M13 au foyer de la FSQ106N ouverte \u00e0 f5 au cours de l’\u00e9claircie qui s’est install\u00e9e entre minuit et deux heures du matin de la nuit de ce vendredi \u00e0 samedi 20 mai 2006. Il s’agit d’un compositage m\u00e9dian de 2 poses de 20 minutes enregistr\u00e9es \u00e0 l’aide du Canon 300D modifi\u00e9 (soustraction du noir inclus). Le champ g\u00e9n\u00e9reux de cet appareil (seule la partie entrale du champ est illustr\u00e9e) permet de d\u00e9celer une multitude de petites galaxies aux alentours de l’amas globulaire, avec notamment NGC 6207 en bas l\u00e9g\u00e8rement \u00e0 droite de M13 et dont on devine les bras spiraux.<\/p>\n

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

Le but premier de la manoeuvre \u00e9tait de tester le diviseur optique r\u00e9cemment acquis chez Unterlinden pour effectuer l’autoguidage. J’avais en effet constat\u00e9 des d\u00e9rives lorsque l’autoguidage se faisait en parall\u00e8le sur ma petite lunette BORG 76ED, d\u00e9rives que j’ai finalement imput\u00e9es aux probl\u00e8mes de flexion diff\u00e9rentielle. J’ai donc acquis cet accessoire pour pallier \u00e0 ce genre de complication et les r\u00e9sultats obtenus lors de cette s\u00e9ance semblent confirmer la justesse de mon interpr\u00e9tation. Les \u00e9toiles sont parfaitement rondes (FWHM de l’ordre de deux pixels pour les \u00e9toiles les plus fines, malgr\u00e9 la turbulence et les rafales de vent).<\/p>\n

Tout cela me semble prometteur pour l’\u00e9t\u00e9 qui s’approche, en esp\u00e9rant cependant une m\u00e9t\u00e9o un peu plus cl\u00e9mente…<\/p>\n

A+,<\/p>\n

Alain SCHMITZ<\/p>\n\n\n

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

Auteur: Alain Schmitz (schmitz_a@swing.be) Bonjour, J’ai r\u00e9ussi \u00e0 photographier le c\u00e9l\u00e8bre amas d’Hercule M13 au foyer de la FSQ106N ouverte \u00e0 f5 au cours de l’\u00e9claircie qui s’est install\u00e9e entre minuit et deux heures du matin de la nuit de ce vendredi \u00e0 samedi 20 mai 2006. Il s’agit d’un compositage m\u00e9dian de 2 poses […]<\/p>\n","protected":false},"author":7,"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-8147","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8147","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=8147"}],"version-history":[{"count":2,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8147\/revisions"}],"predecessor-version":[{"id":15101,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8147\/revisions\/15101"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=8147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=8147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=8147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}