NGC 6888 Crescent Nebula - HOO (Jerry Macon)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192163 · HD192182 · HD192303 · HD192361 · HD228185 · HD228243 · HD228289 · HD228304 · HD228324 · HD228376 · LBN 203 · NGC 6888 · Sh2-105

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NGC 6888 Crescent Nebula - HOO

Powered byPixInsight

NGC 6888 Crescent Nebula - HOO

CDK20: FL 2280mm, F/4.5, 0.34 arcsec/pixel raw
Imaged: 5/31/2022, 6/1/2022, 6/2/2022

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula"
(Wikipedia)

My Collections:
Abell Planetary Nebulae (Complete)
Galaxies
Messier Objects
Planetary Nebulae
Sharpless 2 Objects

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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
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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
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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
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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	5861148
PixInsight job	KBK16RDEEB3WKE7W44QBPJVH9CAO9YKT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m12s.221
RA (top/left)	20h11m05s.740
RA (top/right)	20h11m06s.479
RA (bottom/right)	20h13m18s.795
RA (bottom/left)	20h13m18s.532

Dec (center)	+38°19′47″.24
Dec (top/left)	+38°36′10″.47
Dec (top/right)	+38°03′11″.46
Dec (bottom/right)	+38°03′19″.57
Dec (bottom/left)	+38°36′19″.24

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NGC 6888 Crescent Nebula - HOO

NGC 6888 Crescent Nebula - HOO

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NGC 6888 Crescent Nebula - HOO

NGC 6888 Crescent Nebula - HOO

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