{"id":2053,"date":"2023-08-25T23:02:20","date_gmt":"2023-08-26T03:02:20","guid":{"rendered":"https:\/\/mvas.org\/mvas_wp\/?p=2053"},"modified":"2023-08-25T23:02:20","modified_gmt":"2023-08-26T03:02:20","slug":"ngc-869-884-the-double-cluster-in-perseus-4","status":"publish","type":"post","link":"https:\/\/mvas.org\/?p=2053","title":{"rendered":"NGC 869 & 884 \u2013 The Double Cluster in Perseus"},"content":{"rendered":"\n
\"\"<\/a><\/figure>\n\n\n

Telescope: Unitron <\/span><\/span><\/span>5<\/span><\/span><\/span>10<\/span><\/span><\/span> 5<\/span><\/span><\/span>\u201d f\/1<\/span><\/span><\/span>6<\/span><\/span><\/span> refractor, <\/span><\/span><\/span>Atlas EQ-G<\/span><\/span><\/span><\/span><\/p>\n

Camera: Canon EOS Ra <\/span><\/span><\/span><\/span>full frame DSLR<\/span><\/span><\/span><\/span><\/p>\n

Filter: 2\u201d ZWO IR Cut Filter<\/p>\n

Guide scope: <\/span><\/span><\/span>Williams Optics<\/span><\/span><\/span><\/span> 50mm Guidescope, ASI<\/span><\/span><\/span><\/span>29<\/span><\/span><\/span><\/span>0MM, PHD<\/span><\/span><\/span><\/span><\/p>\n

Exposure: <\/span><\/span><\/span>72<\/span><\/span><\/span>x<\/span><\/span><\/span>6<\/span><\/span><\/span>0<\/span><\/span><\/span>sec, <\/span><\/span><\/span>ISO<\/span><\/span><\/span> 16<\/span><\/span><\/span><\/span>00<\/span><\/span><\/span><\/span>, saved as <\/span><\/span><\/span>RAW<\/span><\/span><\/span><\/p>\n

Darks: Internal (Long Exposure Noise Reduction)<\/span><\/p>\n

Flats: <\/span><\/span><\/span>32×1\/<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>25<\/span><\/span><\/span><\/span>s <\/span><\/span><\/span><\/span>sky<\/span><\/span><\/span><\/span> flats taken at dusk<\/span><\/span><\/span><\/span><\/p>\n

Average Light Pollution: Bortle 8,<\/span><\/span><\/span><\/span> poor<\/span><\/span><\/span><\/span> transparency, <\/span><\/span><\/span><\/span>haze<\/span><\/span><\/span><\/span><\/p>\n

Lensed Sky Quality Meter: 18.1 mag\/arc-sec^2<\/p>\n

Stacking: Mean with a 1-sigma clip<\/p>\n

White Balance: Nebulosity Automatic<\/p>\n

Software: Backyard EOS, Deepsky Stacker<\/span>, Nebulosity, Photoshop<\/span><\/p>\n

This is the second of 3 bonus images that I grabbed as part of my latest imaging run with the 510. I was really curious to see how well the scope would frame this field and I thought that it turned out rather well. This is the full, uncropped field and does a good job showing just how flat the field of the 510 is even across a full frame sensor.<\/span><\/span><\/span><\/span><\/p>\n

For a long time there was some debate as to whether the two clusters that make up the Double Cluster are actually associated with each other or just happened to appear in the same line of sight with one lying behind the other. It now appears that they are indeed lying next to each other, each about 7,000 light years away and about 100 light years apart. However, there is some evidence that the two clusters are of different ages, so while they may have formed separately from each other, they are now traveling companions. <\/span><\/span><\/span><\/span><\/p>\n

The double cluster is currently low in the northeast during the early evening. <\/span><\/span><\/span><\/span>Note that these two clusters lie on an east\/west line as shown, however as they rise they will appear along a vertical line relative to the horizon. (Photo credit; John Graham, <\/span><\/span><\/span><\/span>8<\/span><\/span><\/span><\/span>–<\/span><\/span><\/span><\/span>18-<\/span><\/span><\/span><\/span>20<\/span><\/span><\/span><\/span>23<\/span><\/span><\/span><\/span>.)<\/span><\/span><\/span><\/span><\/p>","protected":false},"excerpt":{"rendered":"

Telescope: Unitron 510 5\u201d f\/16 refractor, Atlas EQ-G Camera: Canon EOS Ra full frame DSLR Filter: 2\u201d ZWO IR Cut Filter Guide scope: Williams Optics 50mm Guidescope, ASI290MM, PHD Exposure: 72x60sec, ISO 1600, saved as RAW Darks: Internal (Long Exposure Noise Reduction) Flats: 32×1\/125s sky flats taken at dusk Average Light Pollution: Bortle 8, poor […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","pgc_sgb_lightbox_settings":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-2053","post","type-post","status-publish","format-standard","hentry","category-forums-deepsky-imaging","entry"],"yoast_head":"\nNGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society<\/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:\/\/mvas.org\/?p=2053\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society\" \/>\n<meta property=\"og:description\" content=\"Telescope: Unitron 510 5\u201d f\/16 refractor, Atlas EQ-G Camera: Canon EOS Ra full frame DSLR Filter: 2\u201d ZWO IR Cut Filter Guide scope: Williams Optics 50mm Guidescope, ASI290MM, PHD Exposure: 72x60sec, ISO 1600, saved as RAW Darks: Internal (Long Exposure Noise Reduction) Flats: 32×1\/125s sky flats taken at dusk Average Light Pollution: Bortle 8, poor […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mvas.org\/?p=2053\" \/>\n<meta property=\"og:site_name\" content=\"Miami Valley Astronomical Society\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-26T03:02:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/mvas.org\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"803\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"John Graham\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"John Graham\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053\"},\"author\":{\"name\":\"John Graham\",\"@id\":\"https:\\\/\\\/mvas.org\\\/#\\\/schema\\\/person\\\/4b76bddd1e4b80037c6412d592a6bcd6\"},\"headline\":\"NGC 869 & 884 \u2013 The Double Cluster in Perseus\",\"datePublished\":\"2023-08-26T03:02:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053\"},\"wordCount\":293,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/mvas.org\\\/mvas_wp\\\/wp-content\\\/uploads\\\/2023\\\/08\\\/NGC-869-884-8-18-2023-1j-512x343.jpg\",\"articleSection\":[\"Deepsky Imaging\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/mvas.org\\\/?p=2053#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053\",\"url\":\"https:\\\/\\\/mvas.org\\\/?p=2053\",\"name\":\"NGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/mvas.org\\\/mvas_wp\\\/wp-content\\\/uploads\\\/2023\\\/08\\\/NGC-869-884-8-18-2023-1j-512x343.jpg\",\"datePublished\":\"2023-08-26T03:02:20+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/#\\\/schema\\\/person\\\/4b76bddd1e4b80037c6412d592a6bcd6\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/mvas.org\\\/?p=2053\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#primaryimage\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/mvas.org\\\/wp-content\\\/uploads\\\/2023\\\/08\\\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/mvas.org\\\/wp-content\\\/uploads\\\/2023\\\/08\\\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1\",\"width\":1200,\"height\":803},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/mvas.org\\\/?p=2053#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/mvas.org\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"NGC 869 & 884 \u2013 The Double Cluster in Perseus\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/mvas.org\\\/#website\",\"url\":\"https:\\\/\\\/mvas.org\\\/\",\"name\":\"Miami Valley Astronomical Society\",\"description\":\"The Universe Is Yours to Discover\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/mvas.org\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/mvas.org\\\/#\\\/schema\\\/person\\\/4b76bddd1e4b80037c6412d592a6bcd6\",\"name\":\"John Graham\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g\",\"caption\":\"John Graham\"},\"url\":\"https:\\\/\\\/mvas.org\\\/?author=3\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"NGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mvas.org\/?p=2053","og_locale":"en_US","og_type":"article","og_title":"NGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society","og_description":"Telescope: Unitron 510 5\u201d f\/16 refractor, Atlas EQ-G Camera: Canon EOS Ra full frame DSLR Filter: 2\u201d ZWO IR Cut Filter Guide scope: Williams Optics 50mm Guidescope, ASI290MM, PHD Exposure: 72x60sec, ISO 1600, saved as RAW Darks: Internal (Long Exposure Noise Reduction) Flats: 32×1\/125s sky flats taken at dusk Average Light Pollution: Bortle 8, poor […]","og_url":"https:\/\/mvas.org\/?p=2053","og_site_name":"Miami Valley Astronomical Society","article_published_time":"2023-08-26T03:02:20+00:00","og_image":[{"width":1200,"height":803,"url":"https:\/\/i0.wp.com\/mvas.org\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1","type":"image\/jpeg"}],"author":"John Graham","twitter_card":"summary_large_image","twitter_misc":{"Written by":"John Graham","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/mvas.org\/?p=2053#article","isPartOf":{"@id":"https:\/\/mvas.org\/?p=2053"},"author":{"name":"John Graham","@id":"https:\/\/mvas.org\/#\/schema\/person\/4b76bddd1e4b80037c6412d592a6bcd6"},"headline":"NGC 869 & 884 \u2013 The Double Cluster in Perseus","datePublished":"2023-08-26T03:02:20+00:00","mainEntityOfPage":{"@id":"https:\/\/mvas.org\/?p=2053"},"wordCount":293,"commentCount":0,"image":{"@id":"https:\/\/mvas.org\/?p=2053#primaryimage"},"thumbnailUrl":"https:\/\/mvas.org\/mvas_wp\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j-512x343.jpg","articleSection":["Deepsky Imaging"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/mvas.org\/?p=2053#respond"]}]},{"@type":"WebPage","@id":"https:\/\/mvas.org\/?p=2053","url":"https:\/\/mvas.org\/?p=2053","name":"NGC 869 & 884 \u2013 The Double Cluster in Perseus - Miami Valley Astronomical Society","isPartOf":{"@id":"https:\/\/mvas.org\/#website"},"primaryImageOfPage":{"@id":"https:\/\/mvas.org\/?p=2053#primaryimage"},"image":{"@id":"https:\/\/mvas.org\/?p=2053#primaryimage"},"thumbnailUrl":"https:\/\/mvas.org\/mvas_wp\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j-512x343.jpg","datePublished":"2023-08-26T03:02:20+00:00","author":{"@id":"https:\/\/mvas.org\/#\/schema\/person\/4b76bddd1e4b80037c6412d592a6bcd6"},"breadcrumb":{"@id":"https:\/\/mvas.org\/?p=2053#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/mvas.org\/?p=2053"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/mvas.org\/?p=2053#primaryimage","url":"https:\/\/i0.wp.com\/mvas.org\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1","contentUrl":"https:\/\/i0.wp.com\/mvas.org\/wp-content\/uploads\/2023\/08\/NGC-869-884-8-18-2023-1j.jpg?fit=1200%2C803&ssl=1","width":1200,"height":803},{"@type":"BreadcrumbList","@id":"https:\/\/mvas.org\/?p=2053#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/mvas.org\/"},{"@type":"ListItem","position":2,"name":"NGC 869 & 884 \u2013 The Double Cluster in Perseus"}]},{"@type":"WebSite","@id":"https:\/\/mvas.org\/#website","url":"https:\/\/mvas.org\/","name":"Miami Valley Astronomical Society","description":"The Universe Is Yours to Discover","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/mvas.org\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/mvas.org\/#\/schema\/person\/4b76bddd1e4b80037c6412d592a6bcd6","name":"John Graham","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6594bdb62c6c4e3996ed828d3634de0cf766055de25500b0111229c5be714921?s=96&d=mm&r=g","caption":"John Graham"},"url":"https:\/\/mvas.org\/?author=3"}]}},"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/posts\/2053","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/mvas.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2053"}],"version-history":[{"count":1,"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/posts\/2053\/revisions"}],"predecessor-version":[{"id":2055,"href":"https:\/\/mvas.org\/index.php?rest_route=\/wp\/v2\/posts\/2053\/revisions\/2055"}],"wp:attachment":[{"href":"https:\/\/mvas.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mvas.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mvas.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}