Crescent Nebula (NGC 6888) (Ani Shastry)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192422 · HD192443 · HD192444 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228198 · HD228205 · HD228243 · HD228261 · HD228262 · HD228277 · HD228289 · HD228290 · HD228291 · HD228304 · HD228311 · HD228324 · HD228376 · And 8 more.

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Crescent Nebula (NGC 6888)

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Crescent Nebula (NGC 6888)

The Crescent Nebula (NGC 6888), captured here with a Celestron EdgeHD 11 at F/7 with a QHY 600M in a combination of SHO (Hubble Palette) and HOO with about 4.5 hours of data. While that amount of data might seem rather limited, I wanted to get something reasonable within the weather and fire season constraints here in the pacific northwest. And so careful processing was required to bring out the intricate details within the structure of the nebula without blowing out the rest of the colors and details.

Discovered in 1792 by William Herschel, it is speculated to be formed by the collision of fast moving stellar winds from the Wolf-Rayet star WR 136 with the slower moving stellar winds ejected by the star as it expanded to become a red giant, creating simultaneously inward and outward moving shockwaves, several hundreds of thousands of years ago.

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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
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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	8360822
PixInsight job	M2CLEBO30ZDQ31Y7KM7DCA4OY876C92N
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m10s.196
RA (top/left)	20h13m59s.100
RA (top/right)	20h13m38s.926
RA (bottom/right)	20h10m19s.880
RA (bottom/left)	20h10m42s.813

Dec (center)	+38°19′46″.79
Dec (top/left)	+37°51′35″.92
Dec (top/right)	+38°50′38″.88
Dec (bottom/right)	+38°47′52″.40
Dec (bottom/left)	+37°48′53″.44

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Crescent Nebula (NGC 6888)

Crescent Nebula (NGC 6888)

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Crescent Nebula (NGC 6888)

Crescent Nebula (NGC 6888)

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