{"id":1787,"date":"2017-08-15T12:33:29","date_gmt":"2017-08-15T10:33:29","guid":{"rendered":"http:\/\/www.austrianaviationart.org\/cms\/?p=1787"},"modified":"2017-08-15T14:36:48","modified_gmt":"2017-08-15T12:36:48","slug":"beobachtungsnacht-14-8-2017","status":"publish","type":"post","link":"https:\/\/www.austrianaviationart.org\/cms\/beobachtungsnacht-14-8-2017\/","title":{"rendered":"Beobachtungsnacht 14.8.2017"},"content":{"rendered":"<p>Der Sommer ist ja immer problematisch: Kurze N\u00e4chte, hohe Temperaturen (= stark erh\u00f6htes Rauschen des Fotosensors) und wenn es dann doch abk\u00fchlt baldige Wolkenbildung und Tau. Nach diesem teilweise sehr kaltem Winter und der Trockeheit sind wenigstens Gelsen (Stechm\u00fccken) kein Problem&#8230;<\/p>\n<p>An diesem Tag war es jedenfalls fast ideal. Mit 22 Grad um 22:00 zwar warm aber ein Nordwind machte mich zuversichtlich dass die Luftfeuchte l\u00e4nger unterhalb der kritischen 92% blieb. Wolken waren auch nur im S\u00fcden und in Horizontn\u00e4he zu sehen. Der Aufgang des 1\/4 Mondes war kurz vor Mitternacht angesagt.<\/p>\n<p>Ich befragte die <a href=\"http:\/\/www.zamg.ac.at\/incaanalyse\/\" target=\"_blank\" rel=\"noopener\">INCA Karte<\/a> die in etwa die aktuellen Werte der vergangenen Stunden zeigt und von der <a href=\"http:\/\/www.zamg.ac.at\/\" target=\"_blank\" rel=\"noopener\">ZAMG<\/a> zur Verf\u00fcgung gestellt wird: Hier kann man dann in etwa absch\u00e4tzen, wie es in der unmittelbaren Zukunft aussieht:<br \/>\n <div id=\"wppa-container-wrapper-1\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-1\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-707-1\" title=\"170814 INCA - Wolken\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/707.gif?ver=32\" alt=\"170814 INCA - Wolken\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-1\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. --><\/p>\n<p><a href=\"https:\/\/www.meteoblue.com\/de\/wetter\/vorhersage\/seeing\/engabrunn_%c3%96sterreich_2780081\" target=\"_blank\" rel=\"noopener\">MetoBlue<\/a> stellt u.a. lokalisierbare Karten zur Verf\u00fcgung, die speziell auf Astronomische Beobachtungen ausgelegt sind. Da sah es auch nicht schlecht aus:<\/p>\n <div id=\"wppa-container-wrapper-2\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-2\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-708-2\" title=\"170814 MeteoBlue \" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/708.gif?ver=32\" alt=\"170814 MeteoBlue \" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-2\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; height:120px; position:fixed; top:50%; margin-top:-60px; left:50%; margin-left:-60px; opacity:1; display:none; 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Max mem: 50.50 Mb. -->\n<p>Was Temperaturen und Feuchte betrifft stimmt es oft nicht. Aber ich habe ja eine <a href=\"http:\/\/www.wunderground.com\/personal-weather-station\/dashboard?ID=INIEDERS267\" target=\"_blank\" rel=\"noopener\">Wetterstation im Garten<\/a> die dass anzeigt, wenn man es nicht sowieso merkt wie es steht&#8230;..<\/p>\n<p>Als ich den Polarstern gerade schon erkennen konnte begann ich mit dem Aufbau. Heute sollte es mit dem Teleskop M27 (Hantelnebel) mit dem Teleskop und der modifizierten Kamera werden. Zus\u00e4tzlich dann eine kleine unmodifizierte Kamera mit dem Olympus FT7-14\/4 Ultraweitwinkel.<br \/>\nDa sowohl Teleskop wie auch Fotolinse F\/4 haben, ist huckepack und gleichzeitiges Ausl\u00f6sen bei gleichen Belichtungseinstellungen ja ideal.<br \/>\nMit dem Ultraweitwinke bekomme ich sicher ein \u00dcbersichtsbild \u00fcber die Milchstra\u00dfe im Zenit. Nicht zu viele Sterne, als dass man sich darin verliert aber dennoch viel mehr, als man mit dem Auge sehen kann.<\/p>\n <div id=\"wppa-container-wrapper-3\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-3\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-705-3\" title=\"170814 Dual Setup\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/705.jpg?ver=32\" alt=\"170814 Dual Setup\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-3\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; height:120px; position:fixed; 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Max mem: 50.50 Mb. -->\n<p>Gegen 22:00 ist noch nicht ganz so dunkel, aber ein erstes Testbild zeigt mir dass es losgehen k\u00f6nnte, wenn nicht wieder Wolkenfelder vom S\u00fcden hereingezogen w\u00e4ren. Gerade beim Ultraweitwinkel zu vergessen. Gl\u00fccklicherweise l\u00f6sen sie sich bald auf.\u00a0 Die visuelle Grenzgr\u00f6\u00dfe von 3-4 (<a href=\"https:\/\/www.austrianaviationart.org\/cms\/umi-kleiner-waagen-kleiner-baer\/\" target=\"_blank\" rel=\"noopener\">am kleinen Wagen abzulesen<\/a>) ist nicht gut, was darauf hindeutet dass es einfach nicht wirklich klar ist. Mit SQM gegen 20,5 ist es dann aber schon mal besser, als andere im Umland von Wien.<\/p>\n<p>Da Andromeda auch schon vern\u00fcnftig hoch steht und dieser Teil des Himmels frei bleibt die n\u00e4chste Zeit stelle ich noch schnell den Star Adventurer mit dem Samyang 135\/2 hinaus. Das ist ja innerhalb 5 Minuten betriebsbereit.<\/p>\n<p>Eine Testbelichtung vor einiger Zeit zeigt mir, das Bildfeld passt wunderbar. Mit F2 geht sich bequem 1 Minuten Belichtungszeit bei ISO800 aus. Da brauch ich nicht mal einen Sequenzer oder die Belichtungssteuerung des Star Adventurers bem\u00fchen (womit ich mich noch nicht mal befassen musste).<\/p>\n <div id=\"wppa-container-wrapper-4\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-4\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-706-4\" title=\"170814 StarAdventurer \" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/706.jpg?ver=32\" alt=\"170814 StarAdventurer \" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-4\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. -->\n<p>&nbsp;<\/p>\n<p>Letztlich kam es aber wie so oft: Kurz vor Mitternacht, beim Mondaufgang war der Himmel zu, sodass ich nach Abwarten, was ich nutzte um Darkframes zu machen, dann eine halbe Stunde sp\u00e4ter abbrach.\u00a0 Es klarte dann zwar nochmals gegen 1:00 auf, aber da war ich dann schon fast im Bett. N\u00e4chstes mal muss ich halt nachlegen.<\/p>\n<p>Hier noch ein sehr schnelles Ergebnis was die 3 Kameras abgeliefert haben. Ich habe nur die Bilder zusammengerechnet, automatische Farbkorrektur\u00a0 und Kontrastkorrektur. Das ganze so wie es ist verkleinert:<\/p>\n<p>Die Sommermilchstra\u00dfe um das Sommerdreieck mit 7mm (14mm KB) Rohbild nach zusammenrechnen der 22 Bilder mit jeweils ISO800 und 4 Minuten Belichtungszeit<\/p>\n <div id=\"wppa-container-wrapper-5\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-5\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-709-5\" title=\"170814 Rohbild nach stacken 7mm CAS-AQL\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/709.jpg?ver=32\" alt=\"170814 Rohbild nach stacken 7mm CAS-AQL\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-5\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. -->\n<p>&nbsp;<\/p>\n<p>Der Hantelnebel (M27) durch den 200\/800 &#8222;Newton ohne Namen&#8220;. Rohbild nach zusammenrechnen von\u00a0 21 Bildern mit je ISO800 und 4 Minuten Belichtungszeit<\/p>\n<p>&nbsp;<\/p>\n <div id=\"wppa-container-wrapper-6\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-6\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-710-6\" title=\"170814 M27 \/ Hantelnebel - Rohbild nach stacken\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/710.jpg?ver=32\" alt=\"170814 M27 \/ Hantelnebel - Rohbild nach stacken\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-6\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. -->\n<p>Und hier die Andromeda Galaxie mit dem Samyang 135\/2 als Rohbild nach stacken.\u00a0 44&#215;1 Minute belichtet ISO800, F\/2 nachgef\u00fchrt mit dem StarAdventurer.<\/p>\n <div id=\"wppa-container-wrapper-7\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-7\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-711-7\" title=\"170814 M31 Rohbild\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/711.jpg?ver=32\" alt=\"170814 M31 Rohbild\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-7\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. -->\n<p>Als Anf\u00e4nger w\u00e4re ich vor 3 Jahren froh gewesen, ein solches Bild final in der Hand zu haben. Heute ist das nur ein Ausgangspunkt f\u00fcr eine ausgefeiltere Bildbearbeitung. Deutlich sieht man z.B. den Helligkeitsgradienten am Himmel und die Farben werden dann noch verst\u00e4rkt. Um nur das Augenscheinlichste zu erw\u00e4hnen.<\/p>\n<p>Wer sich jetzt noch fragt, wo denn die vielen Spuren sind, die durchs Bild fliegende Flugzeuge und Satelliten hinterlassen:<br \/>\nDie werden beim Stacken herausgerechnet, was dann so aussieht:<\/p>\n <div id=\"wppa-container-wrapper-8\" class=\"alignnone wppa-container-wrapper \" style=\"width:100%;clear:both;padding:0;position:relative;\"><div id=\"wppa-container-8\" style=\"width:100%;\" class=\"wppa-container wp-caption\"><div style=\"font-size:0;line-height:0\"><img decoding=\"async\" id=\"ph-712-8\" title=\"170824 M31 reject hight\" style=\"width:100%;margin:0;padding:4px;border:1px solid #777777;box-sizing:border-box;background-color:#cccccc;border-radius:5px;\" src=\"https:\/\/www.austrianaviationart.org\/cms\/wp-content\/uploads\/wppa\/712.jpg?ver=32\" alt=\"170824 M31 reject hight\" class=\"size-medium wppa-sphoto\"><\/div><div class=\"wp-caption-text\"><\/div><svg id=\"wppa-ajax-spin-8\" class=\"wppa-ajax-spin uil-default\" width=\"120px\" height=\"120px\" viewBox=\"0 0 100 100\" preserveAspectRatio=\"xMidYMid\" stroke=\"\" style=\"width:120px; 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Max mem: 50.50 Mb. -->\n<p>Beim Stacken (zusammenrechnen der einzelnen Bilder) wendet man Algoritmen an, die alles was offensichtliche Ausrei\u00dfer sind, aus dem Endergebnis verwerfen.<br \/>\nDas geht oft recht gut, aber wenn es nicht funktioniert, fehlen vielleicht wesentliche Teile des Objekts. Daher tut man gut daran, das zu kontrollieren was weggeworfen wird. Gegeben falls muss man dann die Parameter nachjustieren.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Der Sommer ist ja immer problematisch: Kurze N\u00e4chte, hohe Temperaturen (= stark erh\u00f6htes Rauschen des Fotosensors) und wenn es dann doch abk\u00fchlt baldige Wolkenbildung und Tau. Nach diesem teilweise sehr kaltem Winter und der Trockeheit sind wenigstens Gelsen (Stechm\u00fccken) kein Problem&#8230; An diesem Tag war es jedenfalls fast ideal. Mit 22 Grad um 22:00 zwar &hellip; <a href=\"https:\/\/www.austrianaviationart.org\/cms\/beobachtungsnacht-14-8-2017\/\" class=\"more-link\"><span class=\"screen-reader-text\">Beobachtungsnacht 14.8.2017<\/span> weiterlesen<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[142],"tags":[25,26,42,31,85,79],"class_list":["post-1787","post","type-post","status-publish","format-standard","hentry","category-beobachtungen","tag-astrofotografie","tag-astrophotography","tag-bericht","tag-howto","tag-m31","tag-sternbilder"],"_links":{"self":[{"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/posts\/1787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/comments?post=1787"}],"version-history":[{"count":15,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/posts\/1787\/revisions"}],"predecessor-version":[{"id":1802,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/posts\/1787\/revisions\/1802"}],"wp:attachment":[{"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/media?parent=1787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/categories?post=1787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.austrianaviationart.org\/cms\/wp-json\/wp\/v2\/tags?post=1787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}