{"id":629,"date":"2021-03-29T11:20:33","date_gmt":"2021-03-29T09:20:33","guid":{"rendered":"http:\/\/www.vaunageastronomie.com\/va\/?p=629"},"modified":"2021-04-05T11:14:26","modified_gmt":"2021-04-05T09:14:26","slug":"recit-de-notre-marathon-messier-2021","status":"publish","type":"post","link":"https:\/\/www.vaunageastronomie.com\/va2\/2021\/03\/29\/recit-de-notre-marathon-messier-2021\/","title":{"rendered":"R\u00e9cit de notre marathon Messier 2021"},"content":{"rendered":"\n<p>Juan, Christian et moi-m\u00eame&nbsp;nous retrouvons enfin apr\u00e8s une longue pr\u00e9paration pour cette grande nuit&nbsp;chacun \u00e9quip\u00e9 de son t\u00e9lescope, respectivement un Dobson 400 ES, un Meade LX200 300mm et un Dobson Stargate 458mm Push-to&nbsp;<\/p>\n\n\n\n<p>La soir\u00e9e du mercredi 17 mars est finalement choisie apr\u00e8s beaucoup d\u2019interrogations car d\u2019apr\u00e8s les m\u00e9t\u00e9os consult\u00e9es, nous devrions avoir quelques nuages en soir\u00e9e puis tr\u00e8s peu avec l\u2019avanc\u00e9e de la nuit pour enfin trouver une nuit claire au matin du 18. Difficile aussi de repousser cette date car la lune montante sera de plus en plus pr\u00e9sente. Oups, ce soir il y a un invit\u00e9 surprise, le vent, un vent dantesque avec des rafales \u00e0 80 km\/h balayant sans cesse notre espace d\u2019observation. Dur, dur&nbsp;!<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.vaunageastronomie.com\/va\/wp-content\/uploads\/2021\/03\/image-2-1024x768.png\" alt=\"\" class=\"wp-image-638\" width=\"515\" height=\"389\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.vaunageastronomie.com\/va\/wp-content\/uploads\/2021\/03\/image-1024x768.png\" alt=\"\" class=\"wp-image-636\" width=\"510\" height=\"383\"\/><\/figure>\n\n\n\n<p>Profitant de notre arriv\u00e9e t\u00f4t et en attendant la nuit, nous observons le soleil avec&nbsp;la lunette de Christian, une Coronado de 40 mm, 3 jolies protub\u00e9rances solaires sont pr\u00e9sentes. Absorb\u00e9 par ces observations, je monte tr\u00e8s tardivement mon t\u00e9lescope et bien s\u00fbr sans la jupe&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.vaunageastronomie.com\/va\/wp-content\/uploads\/2021\/03\/image-1-1024x768.png\" alt=\"\" class=\"wp-image-637\" width=\"560\" height=\"419\" srcset=\"https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-1024x768.png 1024w, https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-300x225.png 300w, https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-768x576.png 768w, https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-1536x1152.png 1536w, https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-2048x1536.png 2048w, https:\/\/www.vaunageastronomie.com\/va2\/wp-content\/uploads\/2021\/03\/image-1-360x270.png 360w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/figure>\n\n\n\n<p>Un repas frugal est pris abrit\u00e9s \u00e0 l\u2019arri\u00e8re des voitures, il est 20h00 et enfin la nuit. Habill\u00e9s comme au ski, &#8220;c\u2019est parti&nbsp;&#8221; ! Nous d\u00e9marrons le marathon, j\u2019ai deux bonnets sur la t\u00eate&#8230;, premi\u00e8res difficult\u00e9s, des nuages cachent l\u2019horizon Ouest,&nbsp;M77 premier objet du marathon est rep\u00e9r\u00e9 rapidement, suit M74 mais nous pose probl\u00e8me. Tant pis nous y reviendrons plus tard, on passe \u00e0 M33, M31, 32 et 110, \u00e7a marche fort, je retente M74 malheureusement toujours invisible derri\u00e8re les nuages bas illumin\u00e9s par quelques lumi\u00e8res diurnes.<\/p>\n\n\n\n<p>A 21h00 je suis sur M1 et d\u00e9j\u00e0 15 objets, nous avons pris notre temps sur Orion, M74 est maintenant sous l\u2019horizon. L\u00e0 une grosse s\u00e9rie d\u2019amas ouverts dans la Poupe, le Grand Chien, le Cocher, il faut v\u00e9rifier avec des photos pour certains objets. Ensuite le Cancer et les galaxies du Lion. Quelques nuages nous masquent des Constellations, des allers-retours dans la liste initiale mais finalement \u00e7a passe car j\u2019interverti le Lion et la grande Ourse et \u00e0 22h, je suis pr\u00eat pour l\u2019encha\u00eenement des galaxies du ciel de printemps aid\u00e9 par la disparition des derniers nuages laissant un ciel de toute splendeur.<\/p>\n\n\n\n<p>Je vais voir mes comp\u00e8res et, surprise ! Juan est en avance sur moi, il fait le Marathon avec des cartes et m\u2019explique que ses soir\u00e9es d\u2019entra\u00eenements successifs l\u2019aident bien. Christian avec sa &#8220;raquette&#8221; me devance \u00e9galement de peu.<\/p>\n\n\n\n<p>Une pause th\u00e9-biscuits et \u00e7a repart. La belle Chevelure de B\u00e9r\u00e9nice et la Vierge nous inondent de galaxies. Mince, mon viseur laser me l\u00e2che \u00e0 22h30&nbsp;! je passe au point rouge. 23h30 et 65 objets trouv\u00e9s, Juan nous dit que nous sommes vraiment en avance alors que la fatigue se fait sentir, j\u2019oublie ce que je cherche, me trompe de num\u00e9ro donc une pause s\u2019impose.<\/p>\n\n\n\n<p>Impossible de dormir sur la chaise longue dehors comme pr\u00e9vu, le vent est vraiment fort et les 5\u00b0 de temp\u00e9rature me semblent bien loin du ressenti. Je tente un sommeil dans le duvet sur les 2 si\u00e8ges avant du Kangoo position tr\u00e8s inconfortable pour moi, Christian s\u2019allonge dans sa fourgonnette alors que Juan r\u00e9ussit \u00e0 mettre sa chaise longue dans sa fourgonnette et s\u2019allonge en laissant les portes entre-ouvertes. Vers 2h30 reprise de l\u2019activit\u00e9, le vent s\u2019est encore renforc\u00e9. Une petite boisson chaude, un r\u00e9alignement des encodeurs apr\u00e8s la recharge des batteries et dans Hercule, la Lyre, le Cygne, Ophiuchus, les objets apparaissent, nous passons un peu de temps sur les plus beaux et l\u00e0 les derni\u00e8res difficult\u00e9s avec le Scorpion : M6, M7 impossible\u00a0! je m\u2019autorise aussi quelques allers-retours vers les objets les plus haut du Sagittaire. Il est 4h30, un arr\u00eat de quelques minutes pour laisser monter la douzaine d\u2019objets manquants. Vers 5h20, M75, M70 enfin, ainsi que M6, M7, M55. Il en manque encore 5 et c\u2019est avec difficult\u00e9 que je trouve M72 alors que M73 tout \u00e0 c\u00f4t\u00e9 reste invisible. Fin de partie \u00e0 5h54, le jour est bien l\u00e0 avec aussi des nuages sur l\u2019horizon Est, M30 est bien s\u00fbr inobservable.<\/p>\n\n\n\n<p>Le plus g\u00eanant sur ces objets bas est la pollution lumineuse avec sa r\u00e9verb\u00e9ration couleur sodium sur les quelques nuages. Juan \u00e0 perdu tout ses jalons ou rep\u00e8res depuis un moment, impossible pour lui sans \u00e9toiles de localiser les derniers objets, pourtant ce sont des r\u00e9gions bien connues&#8230;<\/p>\n\n\n\n<p>A notre latitude, faire la totalit\u00e9 du Marathon est exceptionnel et notre objectif \u00e9tait de voir un maximum d\u2019objets et pourquoi pas en voir la totalit\u00e9. Dommage, mais cette premi\u00e8re exp\u00e9rience et malgr\u00e9 les conditions m\u00e9t\u00e9o ex\u00e9crables nous autorise un bilan tr\u00e8s positif :&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Christian, 99 objets avec la raquette.&nbsp;<\/li><li>moi, 106 objets dont plus de 20 trouv\u00e9s sans carte et sans me servir du Push-to.<\/li><li>Juan, 90 objets le tout en recherche visuelle, c\u2019est bien lui le plus m\u00e9ritant.<\/li><\/ul>\n\n\n\n<p>Rendez-vous est pris pour l\u2019an prochain mais sur un site plus&nbsp;&#8220;noir&#8221;. Pour ma part, je vais m\u2019entra\u00eener \u00e0 me passer du push-to sur 50% des objets. Juan de son cot\u00e9, veut am\u00e9liorer la fin de nuit sur des objets bien connus<\/p>\n\n\n\n<p>La boisson chaude de 6h du matin nous stimule et malgr\u00e9 la fatigue, nous verbalisons un premier bilan avant d\u2019aller prendre une bonne&nbsp;<s>nuit<\/s>&nbsp;journ\u00e9e de repos.<\/p>\n\n\n\n<p>La dur\u00e9e et les conditions m\u00e9t\u00e9orologiques ont rendus cette exp\u00e9rience \u00e9prouvante mais tr\u00e8s positive et importante \u00e0 tout astronome amateur que nous sommes. La vitesse d\u2019ex\u00e9cution demand\u00e9e nous exige une concentration, une grande ma\u00eetrise de nos instruments ainsi qu\u2019une tr\u00e8s bonne connaissance du ciel, des constellations et des diff\u00e9rents objets recherch\u00e9s.<\/p>\n\n\n\n<p>Denis.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Juan, Christian et moi-m\u00eame&nbsp;nous retrouvons enfin apr\u00e8s une longue pr\u00e9paration pour cette grande nuit&nbsp;chacun \u00e9quip\u00e9 de son t\u00e9lescope, respectivement un Dobson 400 ES, un Meade LX200 300mm et un Dobson Stargate 458mm Push-to&nbsp; La soir\u00e9e du mercredi 17 mars est finalement choisie apr\u00e8s beaucoup d\u2019interrogations car d\u2019apr\u00e8s les m\u00e9t\u00e9os consult\u00e9es, nous devrions avoir quelques nuages en soir\u00e9e puis tr\u00e8s peu avec l\u2019avanc\u00e9e de la nuit pour enfin trouver une nuit claire au matin du 18. Difficile aussi de repousser cette&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.vaunageastronomie.com\/va2\/2021\/03\/29\/recit-de-notre-marathon-messier-2021\/\">Lire la suite<span class=\"screen-reader-text\"> Lire la suite<\/span><\/a><\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[8],"tags":[24],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","category-soirees-dobservation","tag-24"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>R\u00e9cit de notre marathon Messier 2021 - Vaunage Astronomie<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vaunageastronomie.com\/va2\/2021\/03\/29\/recit-de-notre-marathon-messier-2021\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9cit de notre marathon Messier 2021 - Vaunage Astronomie\" \/>\n<meta property=\"og:description\" content=\"Juan, Christian et moi-m\u00eame&nbsp;nous retrouvons enfin apr\u00e8s une longue pr\u00e9paration pour cette grande nuit&nbsp;chacun \u00e9quip\u00e9 de son t\u00e9lescope, respectivement un Dobson 400 ES, un Meade LX200 300mm et un Dobson Stargate 458mm Push-to&nbsp; La soir\u00e9e du mercredi 17 mars est finalement choisie apr\u00e8s beaucoup d\u2019interrogations car d\u2019apr\u00e8s les m\u00e9t\u00e9os consult\u00e9es, nous devrions avoir quelques nuages en soir\u00e9e puis tr\u00e8s peu avec l\u2019avanc\u00e9e de la nuit pour enfin trouver une nuit claire au matin du 18. 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