NGC6888 - The Crescent Nebula in SHO Hubble Palette (Cfosterstars)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent nebula · NGC 6888 · Sh2-105

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NGC6888 - The Crescent Nebula in SHO Hubble Palette

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NGC6888 - The Crescent Nebula in SHO Hubble Palette

I have a good set of data, but this target does not follow a typical Hubble palette tonal mapping. I am not sure that I gave the data justice.

The Crescent Nebula (NGC6888, 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.

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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	2875686
PixInsight job	Q23DFO8CCB5OJWQW9FF4VFT5LN2C84VL
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h12m10s.501
RA (top/left)	20h11m21s.879
RA (top/right)	20h11m20s.733
RA (bottom/right)	20h12m58s.838
RA (bottom/left)	20h13m00s.641

Dec (center)	+38°21′49″.74
Dec (top/left)	+38°35′47″.58
Dec (top/right)	+38°08′03″.97
Dec (bottom/right)	+38°07′50″.94
Dec (bottom/left)	+38°35′35″.18

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NGC6888 - The Crescent Nebula in SHO Hubble Palette

NGC6888 - The Crescent Nebula in SHO Hubble Palette

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Image Index:

Contribution Index (beta):

NGC6888 - The Crescent Nebula in SHO Hubble Palette

NGC6888 - The Crescent Nebula in SHO Hubble Palette

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Description

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