NGC 6888 (Marco Cosmacini)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · LBN 203 · LBN 208 · NGC 6888 · Sh2-105

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NGC 6888

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NGC 6888

The supernova remnant immersed in the nebulosity of the constellation of Cygnus.
It appears as a delicate and intertwined structure composed mainly of hydrogen together with an oxygen bubble (blue). The diffused nebulosity clearly highlights the distribution of the other elements such as sulfur, hydrogen and oxygen.
Although the image was obtained in narrowband with Ha, OIII and Be filters all at 3 nanometers, I experimented with a new method for a dynamic and separate approach, processing differently the main nebula and the surrounding field. I worked the diffuse nebula in the Hubble Palette modified (to obtain colors more similar to a classic rgb) and the supernova remnant in HOO being the sulfur component almost absent here. This permitted to get the best of both methods in the same photograph. A complex and time-spending process but ultimately very effective. One of the longest post-processing work I ever did but I am satisfied by the result especially the high resolution inside the 6888.
Astro-Physics 180EDT telescope, focal length 1735mm. 0.54 arcsec sampling per pixel.

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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
Backyard
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Public amaeteur data
Professional, scientific grade data
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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	5446664
PixInsight job	22Y649Y0IPSG6CPNN3VHZ8901XYUZA01
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h11m20s.680
RA (top/left)	20h14m27s.353
RA (top/right)	20h08m12s.263
RA (bottom/right)	20h08m16s.340
RA (bottom/left)	20h14m24s.866

Dec (center)	+38°34′03″.73
Dec (top/left)	+39°10′20″.100
Dec (top/right)	+39°10′12″.19
Dec (bottom/right)	+37°57′30″.80
Dec (bottom/left)	+37°57′37″.52

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NGC 6888

NGC 6888

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NGC 6888

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