{"id":8666,"date":"2008-05-28T22:12:46","date_gmt":"2008-05-28T22:12:46","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/m1-la-nebuleuse-du-crabe-avec-un-apn-modifie\/"},"modified":"2025-07-14T11:22:47","modified_gmt":"2025-07-14T09:22:47","slug":"m1-la-nebuleuse-du-crabe-avec-un-apn-modifie","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/m1-la-nebuleuse-du-crabe-avec-un-apn-modifie\/","title":{"rendered":"M1, la n\u00e9buleuse du Crabe avec un APN modifi\u00e9"},"content":{"rendered":"<p>Auteur: Olivier Schreurs (astroliver@gmail.com)<\/p>\n<p>Dans le m\u00eame registre que les 3 galaxies du Lion (les traitements \u00e9gar\u00e9s dans mon PC ;-), voici le r\u00e9manent de supernova le plus connu, captur\u00e9 en fin de nuit d&rsquo;octobre 2007 avec le set-up photo d\u00e9crit pr\u00e9c\u00e9demment:<br \/>\nle T255 sans correcteur et le 350D-mod qui encha\u00eene des poses de 4 min \u00e0 400iso.<br \/>\nLe filtre utilis\u00e9 cette fois est l&rsquo;UHC-S affectionn\u00e9 par Alain.<\/p>\n<p>Limitation \u00e0 4 minutes:<br \/>\nau del\u00e0 les flexions du t\u00e9lescope qui accuse son \u00e2ge (r\u00e9alis\u00e9 100% artisanalement par la g\u00e9n\u00e9ration pr\u00e9c\u00e9dente) et difficile \u00e0 r\u00e9parer de mani\u00e8re durable provoquent une perte de r\u00e9solution bien visible par l&#8217;emp\u00e2tement ou l&rsquo;allongement des \u00e9toiles. L&rsquo;autoguidage relativement correct n&rsquo;est encore possible qu&rsquo;en AD et avant le passage au m\u00e9ridien la plupart du temps.<\/p>\n<p>Sous le ciel de Nandrin trop baign\u00e9 de sodium mais jouissant parfois d&rsquo;une bonne transparence, le filtre UHC semble efficace pour les n\u00e9buleuses \u00e9missives tandis que le LPR Neodym que je cite le plus souvent me donne plus de signal pour les galaxies.<br \/>\nLe fameux IDAS LPS doit se situer entre les 2 Baader cit\u00e9s.<br \/>\n80 minutes cumul\u00e9es. Pr\u00e9traitement par offsets et darks, addition et DDP dans Iris. Pas de flats.<br \/>\nDimensionnement \u00e0 75%<\/p>\n<p>Balance des couleurs par la fonction \u00ab\u00a0black\u00a0\u00bb dans Iris (\u00e9quilibrage du fond de ciel)<br \/>\n<a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-75pc.jpg\" data-lbwps-width=\"581\" data-lbwps-height=\"487\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-75pc-300x251.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-75pc-300x251.jpg\" alt=\"\" width=\"300\" height=\"251\" \/><\/a><\/p>\n<p>Plus de bleu et moins de rouge<br \/>\n<a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-wb-75pc.jpg\" data-lbwps-width=\"581\" data-lbwps-height=\"482\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-wb-75pc-300x249.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-T255-XT-mod-uhc-wb-75pc-300x249.jpg\" alt=\"\" width=\"300\" height=\"249\" \/><\/a><\/p>\n<p>Version 1 boost\u00e9e (ondelettes, lissage, gamma, courbes)<br \/>\n<a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-80min-T255-XT-mod-uhc-boost-75pc.jpg\" data-lbwps-width=\"581\" data-lbwps-height=\"487\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-80min-T255-XT-mod-uhc-boost-75pc-300x251.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2025\/06\/14_20080528-M1-80min-T255-XT-mod-uhc-boost-75pc-300x251.jpg\" alt=\"\" width=\"300\" height=\"251\" \/><\/a><\/p>\n<p>Oli S<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;8666&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;10&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Veuillez voter&quot;,&quot;legend&quot;:&quot;0\\\/10 - (0 vote)&quot;,&quot;size&quot;:&quot;18&quot;,&quot;title&quot;:&quot;M1, la n\u00e9buleuse du Crabe avec un APN modifi\u00e9&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"6\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"7\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"8\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"9\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"10\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 14.4px;\">\n            <span class=\"kksr-muted\">Veuillez voter<\/span>\n    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Auteur: Olivier Schreurs (astroliver@gmail.com) Dans le m\u00eame registre que les 3 galaxies du Lion (les traitements \u00e9gar\u00e9s dans mon PC ;-), voici le r\u00e9manent de supernova le plus connu, captur\u00e9 en fin de nuit d&rsquo;octobre 2007 avec le set-up photo d\u00e9crit pr\u00e9c\u00e9demment: le T255 sans correcteur et le 350D-mod qui encha\u00eene des poses de 4 [&hellip;]<\/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-8666","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8666","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=8666"}],"version-history":[{"count":3,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8666\/revisions"}],"predecessor-version":[{"id":16141,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/8666\/revisions\/16141"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=8666"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=8666"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=8666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}