{"id":2323,"date":"2017-11-14T09:54:47","date_gmt":"2017-11-14T09:54:47","guid":{"rendered":"http:\/\/www.popastro.com\/main_spa1\/deepsky\/?page_id=2323"},"modified":"2018-01-16T17:43:43","modified_gmt":"2018-01-16T17:43:43","slug":"october-2017","status":"publish","type":"page","link":"https:\/\/www.popastro.com\/deepsky\/october-2017\/","title":{"rendered":"October 2017"},"content":{"rendered":"

This month, four section members produced a total of twenty images.<\/p>\n

David Davies\u00a0<\/strong>imaged Collinder 399, an asterism\u00a0\u00a0of ten stars of between magnitude 5 and 7 which lies in the constellation of\u00a0 Vulpecula.<\/p>\n

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CR 399<\/figcaption><\/figure>\n

This asterism was recorded in the 10th century by the Persian astronomer Al Sufi, and is also known as Brocchi’s cluster and for obvious reasons the Coathanger.<\/p>\n

This is a line of sight phenomenon not a true cluster: the ten stars lie at considerably different distances from the Earth, between about 240 light years for the nearest (5 Vul) and 2240 light years for the most distant (HD 183261).<\/p>\n

Observing from Cambridge, David used an APM 107 APO refractor and QSI 583 mono camera plus red, green and blue filters.<\/p>\n

Steve Cooke<\/strong> sent in a total of ten images of a wide variety of deep sky objects, the first four are globular clusters M15 in Hercules, M2 in Aquarius, and open clusters M45 the Pleiades in Taurus and M35 in Gemini.\u00a0\u00a0 The smaller, more compact open cluster at the top right of the M35 image is NGC 2158.<\/p>\n

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M15<\/figcaption><\/figure>\n
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M2<\/figcaption><\/figure>\n
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M45<\/figcaption><\/figure>\n
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M35<\/figcaption><\/figure>\n

 <\/p>\n

Steve’s next four images are open cluster M11, the Wild Duck cluster in Scutum;\u00a0 B 33, the Horsehead dark nebula within emission nebula IC 434 in Orion;\u00a0 then planetary nebulae M27, the Dumbbell nebula in Vulpecula and M57, the Ring nebula in Lyra.<\/p>\n

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M11<\/figcaption><\/figure>\n
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B 33<\/figcaption><\/figure>\n

 <\/p>\n

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M27<\/figcaption><\/figure>\n
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M57<\/figcaption><\/figure>\n

Steve’s final two images are M42 emisson\/reflection nebula in the constellation of Orion, and right M33, the Pinwheel spiral galaxy in Triangulum.<\/p>\n

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M42<\/figcaption><\/figure>\n

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 <\/p>\n

Steve, observing from Brixton, used a Skywatcher 200P Newtonian reflector and Canon 1000D DSLR for the above images.<\/p>\n

 <\/p>\n

Alan Clitherow,<\/strong>\u00a0SPA Planetary section director,\u00a0made this image of emission\/reflection nebula IC 63 in the constellation of Cassiopeia.\u00a0 The bright star in the image is gamma Cass.<\/p>\n

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IC 63<\/figcaption><\/figure>\n

This is one region of the nebulosity surrounding gamma Cass, and is slightly closer to the star than the other part, not in this image, which is predominantly a reflection nebula labelled IC 59.\u00a0 Gamma Cass shines at apparent magnitude 2;\u00a0 the nebulosity is much fainter at magnitude 10.<\/p>\n

Alan, observing from Fife, used a MN 190P Maksutov – Newtonian telescope and Canon EOS 600D astro – modified DSLR for this H alpha\/ RGB image.<\/p>\n

 <\/p>\n

Steve Norrie,<\/strong>\u00a0also observing from Fife, sent in eight images to the section.\u00a0 For these images Steve employed an ES 127mm APO refractor working at f5, and a StarlightXpress Trius 694 mono camera plus red, green, blue and narrow band filters.<\/p>\n

Steve’s first four images are:\u00a0 emission nebulae IC 1318, in the constellation of Cygnus and IC 1848, the Soul nebula in Cassiopeia (both of the latter in the Hubble palette),\u00a0 then NGC 1499 the California emission nebula in Perseus and IC 434 (plus B33) the Horsehead nebula in Orion alredy mentioned above.\u00a0 The last two images are H alpha\/green \/blue plus H alpha luminance.<\/p>\n

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IC 1318<\/figcaption><\/figure>\n

IC 1318 appears to surround second magnitude star Sadr or gamma Cyni, lying at the centre of the cross of stars defining the constellation.\u00a0 In reality Sadr is twice as close to the Earth as the nebulosity.<\/p>\n

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IC 1848<\/figcaption><\/figure>\n
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NGC 1499<\/figcaption><\/figure>\n
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IC 434, B 33<\/figcaption><\/figure>\n

Steve’s last four images are IC 63, reflection\/emission nebula in the constellation of Cassiopeia, (H alpha (monochrome image) described above;\u00a0 M33 spiral galaxy in Triangulum;\u00a0 NGC 896 the Heart emission nebula in Cassiopeia and NGC 2174 emission nebula in Orion (H alpha mono image).<\/p>\n

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IC 63<\/figcaption><\/figure>\n
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M33<\/figcaption><\/figure>\n
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NGC 896<\/figcaption><\/figure>\n
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NGC 2174<\/figcaption><\/figure>\n

 <\/p>\n

Dave Finnigan\u00a0<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

This month, four section members produced a total of twenty images. David Davies\u00a0imaged Collinder 399, an asterism\u00a0\u00a0of ten stars of between magnitude 5 and 7 which lies in the constellation of\u00a0 Vulpecula. This asterism was recorded in the 10th centuryRead more<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-2323","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t