Sh2-91 - 2019 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 12 phi Cyg · 9 Cyg · Sh2-91 · The star 9Cyg · The star φCyg

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Sh2-91 - 2019

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Sh2-91 - 2019

This object, discovered in 1977, is comprised of filaments from the supernova remnant SNR 065.2+05.7. It is located 2500 light years away in the constellation of Cygnus. Overshadowed by the magnificent Veil Nebula (Cygnus Loop) SNR in the same constellation, this object is much more faint but still beautiful as it stands silhouetted against the dense starry background.

This SNR is huge, covering an area of 16 square degrees. This image only captures a small portion of it - other portions include Sh2-94 and Sh2-96. Because it is so large, with a diameter of 230 light years, it is very faint compared to the Veil Nebula. It is also very old - age estimates range from 20,000 to 400,000 years. The large age range is because there may be multiple supernova remnants overlapping in this area.

I have attached an image from a 2002 paper by Mavromatakis et al which shows the field of view of this image as compared to the entire SNR. The subject of this image is identified by numbers 2, 8 and 3.

Out of respect for this wonderful object, I refuse to call it the "Little Veil" as some do. Besides, the Veil Nebula is only 100 light years in diameter compared to this object's 230 light year diameter, so if anything this object should really be called the "Big Veil".

ZWO ASI1600MM/QHY163M
Narrowband imaging
Takahashi Refractors
Sharpless2 Objects
The refractors!
Cloudy Nights

Sharpless Catalog (200/313)
SNR

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	2860005
PixInsight job	1VSRXZECDEH06E0Z5EOQFKBPSHEO2666
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h36m04s.42
RA (top/left)	19h40m29s.90
RA (top/right)	19h30m23s.62
RA (bottom/right)	19h31m44s.24
RA (bottom/left)	19h41m41s.22

Dec (center)	+29°34′19″.8
Dec (top/left)	+30°33′39″.5
Dec (top/right)	+30°11′48″.9
Dec (bottom/right)	+28°34′18″.9
Dec (bottom/left)	+28°55′50″.2

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Sh2-91 - 2019

Sh2-91 - 2019

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Sh2-91 - 2019

Sh2-91 - 2019

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