{"id":2168,"date":"2016-11-01T00:00:00","date_gmt":"2016-11-01T00:00:00","guid":{"rendered":"http:\/\/localhost:8888\/wordpress\/?p=2168"},"modified":"2018-01-13T17:47:44","modified_gmt":"2018-01-13T17:47:44","slug":"october-2016","status":"publish","type":"page","link":"https:\/\/www.popastro.com\/deepsky\/october-2016\/","title":{"rendered":"October 2016"},"content":{"rendered":"

Six section members submitted their observations this month, in total twenty five digital images.<\/p>\n

Mark Beveridge<\/strong> of Aberdeen sent in seven of these.\u00a0 Here is M2, a globular cluster in the constellation of Aquarius then M27 the “dumbbell” planetary nebula in Vulpecula, NGC 6781 planetary nebula in Aquarius and NGC 7009, also a planetary nebula in Aquarius also known as the Saturn nebula;\u00a0 which bears a resemblance to the nearly edge – on ringed planet.<\/p>\n

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M2<\/figcaption><\/figure>\n
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M27<\/figcaption><\/figure>\n
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NGC 6781<\/figcaption><\/figure>\n
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NGC 7009<\/figcaption><\/figure>\n

Next is an enlarged, cropped version of the NGC 7009 image, then M57 the Ring planetary nebula in Lyra, M74 spiral galaxy in Pisces and NGC 1579 emission nebula in Perseus.<\/p>\n

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NGC 7009<\/figcaption><\/figure>\n
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M57<\/figcaption><\/figure>\n
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M74<\/figcaption><\/figure>\n
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NGC 1579<\/figcaption><\/figure>\n

The latter is sometimes called the Northern Triffid and is a HII region of new star formation about 2,000 light years from the Earth.\u00a0 It resembles M20, the Triffid nebula in Sagittarius, having both emission and reflection components, plus dark lanes of dust; in fact much of the visible spectrum light from the young stars is being obscured, and infra red telescopes are required to study them.\u00a0 Mark used a 140mm f14.3 Maksutov-Cassegrain telescope and SXR-H814 camera plus R, G and B filters.<\/p>\n

 <\/p>\n

Geoff Elston<\/strong>, SPA Solar section Director, also sent in seven images taken via an 80mm refractor and Canon D550 DSLR camera.\u00a0 The first two are the planetary nebulae M27 and M57 also seen above;\u00a0 it is interesting to note the kind of image each telescope\/camera combination can produce.<\/p>\n

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

Geoff’s next four images are, M31 spiral galaxy in the constellation of Andromeda, M39 open cluster in Cygnus, NGC 6910 the Rocking horse open cluster also in Cygnus and globular cluster NGC 6934 in Delphinus.<\/p>\n

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M31<\/figcaption><\/figure>\n
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M39<\/figcaption><\/figure>\n
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NGC 6910<\/figcaption><\/figure>\n
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NGC 6934<\/figcaption><\/figure>\n

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Geoff’s final image is of NGC 6960, the western part of the Veil supernova remnant in Cygnus.\u00a0 Estimates of the age of this object vary widely between 5,000 and 8,000 years.\u00a0 It is around 1,500 light years from the Earth.\u00a0 The whole remnant covers an area of around three degrees, or six times the diameter of the full moon.<\/p>\n

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NGC 6960<\/figcaption><\/figure>\n

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Ian Sharp <\/strong>imaged edge – on galaxy NGC 891 in\u00a0 the constellation of Andromeda.\u00a0 It is a member of the NGC 1023 group of galaxies and is around 30 million light years from the Earth.\u00a0 It is thought that our own galaxy the Milky Way would look very much like NGC 891 if it were possible to view it edge-on from a great distance.\u00a0 Ian used a 250mm Schmidt Cassegrain telescope and an Atik infinity one-shot colour camera to capture this image.<\/p>\n

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NGC 891<\/figcaption><\/figure>\n

Dave Hancox<\/strong> of Dalmellinton imaged three emission nebulae with a 102mm triplet refractor and a QHY 8L camera.\u00a0 First is IC 396, the Elephant’s trunk nebula in the constellation of Cepheus.<\/p>\n

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IC 1396<\/figcaption><\/figure>\n

Here are NGC 6888, the Crescent nebula and NGC 7000, the North America nebula;\u00a0 both of these in Cygnus.<\/p>\n

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NGC 6888<\/figcaption><\/figure>\n
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NGC 7000<\/figcaption><\/figure>\n

The Crescent is unlike the others, because it is the stellar wind from a Wolf Rayet star that is causing the gas it expelled when it was in the red giant stage to become ionised.\u00a0 On the other hand, it is young, hot stars producing the ionisation in the gas and dust clouds from which they were formed in IC 396 and NGC 7000.\u00a0 In both cases, it is when ionised hydrogen, (HII), recombines with an electron and then emits a photon of wavelenth 656.3 nanometers, that the charactristic pink\/red glow is produced.<\/p>\n

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Steve Norrie<\/strong> of Fife sent in five images;\u00a0 the first two are emission\/dark nebula IC 434 is the Horsehead in the constellation of Orion and IC 5070 the Pelican emission nebula in Cygnus.<\/p>\n

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IC 434<\/figcaption><\/figure>\n
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IC 5070<\/figcaption><\/figure>\n

Steve’s next three images are M1 the Crab supernova remnant in Taurus, M81 or Bode’s galaxy in Ursa Major, and M74 galaxy in Pisces.<\/p>\n

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M1<\/figcaption><\/figure>\n
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M81<\/figcaption><\/figure>\n
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M74<\/figcaption><\/figure>\n

M74, featured twice in this report, is about 32 light years from the Earth.\u00a0 Face-on, and with a low surface brightness, this magnitude 10 galaxy can be hard to see in the eyepiece of a telescope regardless of aperture.\u00a0 Supernovae have been seen in M74 in 2002, 2003 and 2013.\u00a0 The 2002 event was a rare type 1c which means the progenitor star possessed almost no hydrogen and little helium.\u00a0 This corresponds to a type of Wolf Rayet star, probably with an initial mass of more than nine times that of the sun.\u00a0 Steve used a 127mm f5 refractor and an Atik 490 EX one-shot colour camera for these images.<\/p>\n

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David Davies<\/strong> of Cambridge sent in two images.\u00a0 The Deer Lick group of galaxies, most prominent of which is NGC 7331, lies in the constellation of Pegasus.\u00a0 Hickson 92, better known as Stephan’s Quintet, is also in Pegasus.\u00a0 David secured these images via a 200mm Richey Chretien telescope and a QSI583 camera plus R,G and B filters.<\/p>\n

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NGC 7331<\/figcaption><\/figure>\n
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Stephan’s Quintet<\/figcaption><\/figure>\n

 <\/p>\n

Dave Finnigan<\/em><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Six section members submitted their observations this month, in total twenty five digital images. Mark Beveridge of Aberdeen sent in seven of these.\u00a0 Here is M2, a globular cluster in the constellation of Aquarius then M27 the “dumbbell” planetary nebulaRead more<\/span><\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-2168","page","type-page","status-publish","hentry","category-reports"],"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