SH2-91

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 12 Cyg · 12 phi Cyg · 9 Cyg · HD183971 · HD184058 · HD184150 · HD184719 · HD184738 · HD184907 · HD185268 · HD185332 · HD185735 · HD185755 · HD185756 · HD186259 · HD332361 · HD332362 · HD332363 · HD332364 · HD332365 · HD332369 · HD332378 · HD332380 · HD332381 · HD332382 · HD332383 · HD332384 · HD332385 · HD332386 · HD332387 · And 22 more.

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SH2-91

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SH2-91

This was a mammoth project for me. First of all it was a 75% and 83% moon over two consecutive nights, and I also have skies that are so light at the moment because of the time of year, that it never gets dark at all - so it was very difficult to get the quality data I desired for this faint object, which I have always wanted to image since Gary took it a little while ago. It took so many inventive techniques to draw out the detail, but even then it was so tough, and I really have stretched this as far as I think it can go. The stf stretch in Pixinsight showed a little more detail, but then it brings forth the mass of stars all at the same time, which means the nebulosity gets lost. I like stf as a rule, but I feel it gives a false reading of what one can actually sometimes get out of the data, as what it shows is not always what I can pull out - at least that is how it seems to me to be. Anyway, I am pleased with what I got and it feels like a real achievement for me. It was 69 Has and 60 OIIIs each at 4 minutes exposure time. This equates to 8 hours and 32 minutes imaging time. Thanks everyone...

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5861710
PixInsight job	FPWGXKLA1U4IO6XFRH0EGQ450TTKPO7R
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h36m09s.93
RA (top/left)	19h30m40s.75
RA (top/right)	19h42m36s.49
RA (bottom/right)	19h41m45s.89
RA (bottom/left)	19h29m37s.65

Dec (center)	+29°42′59″.4
Dec (top/left)	+28°41′35″.1
Dec (top/right)	+29°00′15″.4
Dec (bottom/right)	+30°43′33″.0
Dec (bottom/left)	+30°24′35″.2

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SH2-91

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SH2-91

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