{"id":8902,"date":"2023-03-08T08:00:00","date_gmt":"2023-03-08T07:00:00","guid":{"rendered":"http:\/\/www.blog.neoprog.eu\/?p=8902"},"modified":"2023-03-07T17:40:19","modified_gmt":"2023-03-07T16:40:19","slug":"quarante-kilos","status":"publish","type":"post","link":"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/03\/08\/quarante-kilos\/","title":{"rendered":"Quarante kilos"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42-1024x683.jpg\" alt=\"\" class=\"wp-image-8903\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42-1024x683.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42-300x200.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42-768x512.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42-450x300.jpg 450w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-42.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">N\u00e9buleuse d&rsquo;Orion &#8211; M 42 &#8211; 15 s &#8211; 1000 ISO<\/figcaption><\/figure>\n\n\n\n<p>Dans un pr\u00e9c\u00e9dent \u00e9pisode, je vous parlais <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/02\/24\/astrophotographie\/\">astrophotographie<\/a>. Depuis mes dix ans, je suis passionn\u00e9 par l\u2019espace. Mais je pense que j\u2019\u00e9tais pr\u00e9destin\u00e9 apr\u00e8s avoir regard\u00e9 \u00e0 trois ans, l\u2019alunissage d\u2019<a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2017\/02\/25\/apollo\/\">Apollo 11<\/a> \u00e0 la t\u00e9l\u00e9vision. J\u2019ai d\u2019abord d\u00e9vor\u00e9 des livres d\u2019astronomie pour enfants. Puis \u00e0 treize ans, lorsque j&rsquo;ai d\u00e9m\u00e9nag\u00e9 \u00e0 Saint-Brieuc, j\u2019ai rejoint un <a href=\"http:\/\/www.astrosurf.com\/astroenbaiedarmor\/\">club<\/a> o\u00f9 j\u2019ai  appris le peu que je connais du ciel et de ses myst\u00e8res. On y construisait un <a href=\"https:\/\/spcl.ac-montpellier.fr\/moodle\/pluginfile.php\/14615\/mod_resource\/content\/0\/ONDES_FS13b_Telescope.pdf\">t\u00e9lescope Newton<\/a> de 210 mm (je parle ici du diam\u00e8tre du miroir principal, pas de la longueur du tube) selon les plans de Pierre Bourges. Nous partions \u00e0 la campagne les nuits claires pour observer les n\u00e9buleuses, galaxies, amas ouverts ou globulaires et \u00e0 l\u2019\u00e9poque je connaissais mon catalogue Messier par coeur.&nbsp;<\/p>\n\n\n\n<p>C\u2019est \u00e0 cette \u00e9poque que j\u2019ai rencontr\u00e9 l\u2019astrophysicien <a href=\"https:\/\/www.hubertreeves.info\">Hubert Reeves<\/a> et regard\u00e9 l\u2019\u00e9mission <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Cosmos_(\u00e9mission_de_t\u00e9l\u00e9vision)\">Cosmos<\/a> de Carl Sagan.<\/p>\n\n\n\n<p>Les jours pluvieux, nous passions des diapositives de la Nasa, organisions des expositions, programmions des logiciels d\u2019astronomie ou travaillons sur notre prochain t\u00e9lescope, un 260 mm que je n\u2019ai jamais vu termin\u00e9. Car je suis parti loin du club poursuivre mes \u00e9tudes \u00e0 Rennes.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-1024x681.jpg\" alt=\"\" class=\"wp-image-8915\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-1024x681.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-300x200.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-768x511.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-1536x1022.jpg 1536w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45-451x300.jpg 451w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-45.jpg 1539w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Pl\u00e9iades &#8211; M 45 &#8211; 30 s &#8211; 500 ISO<\/figcaption><\/figure>\n\n\n\n<p>Pendant bien des ann\u00e9es, j\u2019ai mis entre parenth\u00e8se ma passion pour les \u00e9toiles. J\u2019y suis petit \u00e0 petit revenu avec la photographie, mais en pointill\u00e9s car j\u2019ai besoin de dormir la nuit.<\/p>\n\n\n\n<p>Depuis plus de quarante ans je r\u00eave d\u2019un t\u00e9lescope, un <a href=\"https:\/\/www.celestron.fr\/schmidt-cassegrain\/2574-nexstar-8-se-0050234110693.html\">Celestron 8<\/a>, un Schmidt Cassegrain, un miroir de 200 mm avec un tube de 400 mm, contrairement au Newton qui d\u00e9passe le m\u00e8tre. Quand j\u2019\u00e9tais jeune, la d\u00e9pense repr\u00e9sentait un an de salaire et ensuite je n\u2019ai plus eu de temps pour \u00e7a. Mais depuis quelques ann\u00e9es j\u2019y songe, m\u00eame si le climat alsacien ne se pr\u00eate gu\u00e8re \u00e0 l\u2019observation du ciel.<\/p>\n\n\n\n<p>La visite chez un de nos observateurs b\u00e9n\u00e9voles passionn\u00e9 d\u2019astronomie qui poss\u00e8de son propre observatoire au fond du jardin \u00e0 r\u00e9veill\u00e9 une passion \u00e9touff\u00e9e depuis longtemps.<\/p>\n\n\n\n<p>Puis le passage successif de com\u00e8tes dans nos cieux a r\u00e9activ\u00e9 le vieux fantasme. Et m\u00eame si je sais que le t\u00e9lescope ne sortira pas souvent, j\u2019ai d\u00e9cid\u00e9 de me faire plaisir.<\/p>\n\n\n\n<p>Donc voil\u00e0, j\u2019ai pass\u00e9 commande d\u2019un t\u00e9lescope Schmidt Cassegrain avec une monture \u00e9quatoriale motoris\u00e9e. Dans les accessoires indispensables j\u2019ai ajout\u00e9 une batterie pour alimenter la monture, un viseur polaire, deux oculaires et un adaptateur pour l\u2019appareil photo. Une pure folie, mais bon, on a qu&rsquo;une vie non ?<\/p>\n\n\n\n<p>Ce que je n\u2019avais pas trop regard\u00e9, c\u2019\u00e9tait le poids de l\u2019ensemble, plus de quarante kilogrammes ! Oui, l\u2019acier, c\u2019est lourd. J\u2019ai un peu flipp\u00e9 \u00e0 l\u2019id\u00e9e de trimbaler autant de mat\u00e9riel sur le toit du monde pour r\u00e9aliser quelques clich\u00e9s minables. Mais au final, l\u2019\u00e9quipement en trois parties est relativement transportable.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter-1024x683.jpg\" alt=\"\" class=\"wp-image-8914\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter-1024x683.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter-300x200.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter-768x512.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter-450x300.jpg 450w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/Jupiter.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Jupiter &#8211; 1\/20 s &#8211; 320 ISO<\/figcaption><\/figure>\n\n\n\n<p>Le d\u00e9ballage et montage de l\u2019ensemble m\u2019a pris une apr\u00e8s-midi avec mon fils. Certaines notices sont limpides, d\u2019autre moins. L\u2019installation de la monture a \u00e9t\u00e9 longue mais simple, la pose du chercheur sur le tube assez angoissante, la mise \u00e0 jour du logiciel et les tests de l\u2019\u00e9quatoriale \u00e9pique.&nbsp;<\/p>\n\n\n\n<p>La mise \u00e0 jour n\u2019a pas fonctionn\u00e9 depuis le Mac et j\u2019ai d\u00fb utiliser le PC de mon fils pour arriver au bout de l\u2019installation. Manifestement l\u2019application Java g\u00e8re mal les entr\u00e9es sorties du Mac. La monture elle ne fonctionnait pas en d\u00e9clinaison jusqu\u2019\u00e0 que mon fils trouve un cable non mentionn\u00e9 dans la documentation \u00e0 brancher au moteur. Ceci dit, le cable en question ne fonctionnait pas et j\u2019ai d\u00fb le remplacer par un autre. Au passage, le service apr\u00e8s-vente de <a href=\"https:\/\/www.medas-instruments.com\">Medas<\/a> est top. Pas besoin de pleurnicher par mail, c\u2019est eux qui vous contactent. Respect !<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-1024x681.jpg\" alt=\"\" class=\"wp-image-8904\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-1024x681.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-300x200.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-768x511.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-1536x1022.jpg 1536w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune-451x300.jpg 451w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/lune.jpg 1539w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Lune &#8211; 1\/20 s &#8211; 100 ISO<\/figcaption><\/figure>\n\n\n\n<p>La mise en station de la monture a donn\u00e9 lieu \u00e0 quelques achats suppl\u00e9mentaires, une boussole pour trouver le Nord, oui parce que l\u2019iPhone est compl\u00e8tement \u00e0 l\u2019Ouest, un niveau \u00e0 bulle pour que tout soit d\u2019\u00e9querre et un plateau \u00e0 queue d\u2019aronde pour fixer l\u2019appareil photo \u00e0 la monture en l\u2019absence de t\u00e9lescope, un Barlow x3 pour les plan\u00e8tes et un viseur laser car j\u2019avais l\u2019habitude d\u2019un tube de t\u00e9lescope rectangulaire et j\u2019ai un mal de chien \u00e0 pointer un objet avec le tube du Celestron. Et pour lutter contre froid je suis pass\u00e9 \u00e0 D\u00e9cathlon prendre des sous-v\u00eatements de ski histoire de tenir plusieurs heures \u00e0 0\u00b0C sans finir congel\u00e9.<\/p>\n\n\n\n<p>Depuis le jardin, en pleine ville, avec un ciel partiellement voil\u00e9, j\u2019ai quand m\u00eame r\u00e9ussi \u00e0 photographier <a href=\"https:\/\/fr.wikipedia.org\/wiki\/N\u00e9buleuse_d%27Orion\">M 42<\/a>, <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2022\/01\/14\/un-bout-de-mars\/\">Mars<\/a>, les <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pl\u00e9iades_(astronomie)\">Pl\u00e9iades<\/a> et \u00e0 trouver <a href=\"https:\/\/fr.wikipedia.org\/wiki\/M37_(amas_ouvert)\">M 37<\/a>. Je suis \u00e9galement all\u00e9 \u00e0 la campagne avec mon fiston, le ciel n&rsquo;\u00e9tait pas parfait et une bise de nord-est piquait la peau mais nous avons retrouv\u00e9 M 42, M 37 et j&rsquo;ai revu la fabuleuse <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Galaxie_d%27Androm\u00e8de\">galaxie d&rsquo;Androm\u00e8de<\/a>, M 31, la conjonction Jupiter\/V\u00e9nus sans parler de la Lune.<\/p>\n\n\n\n<p>Vendredi je suis parti en exp\u00e9dition au Champ du Feu \u00e0 pr\u00e8s de mille m\u00e8tre d&rsquo;altitude vers 17h pour profiter du coucher de soleil,  afin d&rsquo;\u00e9chapper \u00e0 la pollution lumineuse et atmosph\u00e9rique pour r\u00e9aliser de belles images du ciel et me livrer \u00e0 ma passion, une de plus me direz-vous. J&rsquo;\u00e9tais tout seul dans le noir, sur un grand parking, probablement entour\u00e9 d&rsquo;une meute de loups, de lynx, de sangliers mais surtout recouvert de poussi\u00e8res d&rsquo;\u00e9toiles. C&rsquo;\u00e9tait magnifique !<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31-1024x683.jpg\" alt=\"\" class=\"wp-image-8913\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31-1024x683.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31-300x200.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31-768x512.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31-450x300.jpg 450w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2023\/03\/M-31.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">M 31 &#8211; Galaxie d&rsquo;Androm\u00e8de &#8211; 30 s &#8211; 1000 ISO<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Dans un pr\u00e9c\u00e9dent \u00e9pisode, je vous parlais astrophotographie. Depuis mes dix ans, je suis passionn\u00e9 par l\u2019espace.  <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2023\/03\/08\/quarante-kilos\/\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":8903,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[7],"tags":[185,2746,2745,2747,661,1053,875,2744],"class_list":["post-8902","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-photo","tag-astronomie","tag-astrophotographie","tag-celestron","tag-ciel","tag-etoiles","tag-passion","tag-photographie","tag-telescope","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quarante kilos - Le Blog du N\u00e9oprog<\/title>\n<meta name=\"description\" content=\"Dans un pr\u00e9c\u00e9dent \u00e9pisode, je vous parlais astrophotographie. 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