{"id":9719,"date":"2015-05-24T10:28:49","date_gmt":"2015-05-24T10:28:49","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/solar-observation-herschell-newton-d250-instrumental-turbulence\/"},"modified":"2025-06-08T22:46:04","modified_gmt":"2025-06-08T20:46:04","slug":"solar-observation-herschell-newton-d250-instrumental-turbulence","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/solar-observation-herschell-newton-d250-instrumental-turbulence\/","title":{"rendered":"Solar observation – Herschell Newton D250 – Instrumental turbulence"},"content":{"rendered":"

Voici un nouveau jou-jou solaire.
\nL’optique est de type newton, mais sans<\/strong> aluminure. L’image est renvoy\u00e9e par r\u00e9flexion vitreuse vers le secondaire. Le reste est diffus\u00e9 \u00e0 l’arri\u00e8re du miroir qui est d\u00e9poli. On est dans la cat\u00e9gorie \u00ab\u00a0Herschell\u00a0\u00bb.
\nDiam\u00e8tre: 250mm<\/p>\n

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

Pour minimiser la turbulence instrumentale, le tube est compl\u00e8tement ouvert.
\nLe secondaire d’origine est remplac\u00e9 par une structure la plus fine et la plus ouverte possible.
\nSupport original du primaire:<\/p>\n

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

Nouveau support:<\/p>\n

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

Il y a encore du travail d’optimisation, mais voici les premiers r\u00e9sultats. Les images sont captur\u00e9es vers 18h00 heure locale.
\nEn solar continuum:<\/p>\n

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

En IR pass 742nm:<\/p>\n

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

Alexandre
\n2015-May-22
\nHerschell Newton
\nD250mm
\nF1750mm
\nPowermate x2.4
\nSolar spectrum or IR Pass 742 nm
\nBasler ACA1300
\nStack of 12<\/p>\n\n\n

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\n 10\/10 - (1 vote) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Voici un nouveau jou-jou solaire. L’optique est de type newton, mais sans aluminure. L’image est renvoy\u00e9e par r\u00e9flexion vitreuse vers le secondaire. Le reste est diffus\u00e9 \u00e0 l’arri\u00e8re du miroir qui est d\u00e9poli. On est dans la cat\u00e9gorie \u00ab\u00a0Herschell\u00a0\u00bb. Diam\u00e8tre: 250mm Pour minimiser la turbulence instrumentale, le tube est compl\u00e8tement ouvert. Le secondaire d’origine est […]<\/p>\n","protected":false},"author":16,"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-9719","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9719","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\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=9719"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9719\/revisions"}],"predecessor-version":[{"id":11968,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9719\/revisions\/11968"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}