NGC6888 The Crescent Nebula in Cygnus (Peter Kennett)

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

Powered byPixInsight

NGC6888 The Crescent Nebula in Cygnus

Powered byPixInsight

NGC6888 The Crescent Nebula in Cygnus

NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. This telescopic portrait uses ultra narrow band image data that isolates light from ionized hydrogen, doubly ionized oxygen and sulfur atoms in the wind-blown nebula. The oxygen atoms produce the blue color that seems to enshroud the folds and filaments. The deep red color in the background is hydrogen, and it also is what also causes much of the actual nebula to glow.

Visible within the nebula, NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of our Sun's mass every 10,000 years. The nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life, this star should ultimately go out with a bang in a spectacular supernova explosion.

Located in the constellation Cygnus, NGC 6888 is about 5,000 light-years away.

This image was created by taking 13 hours of exposures.

The nebula was created with H-Alpha, OIII and SII images (H-Alpha 69 x 3-minutes, OIII 96 x 3 minutes, SII 35 x 3-minutes). These images were combined into a color image by assigning H-Alpha to Red, SII to Green and OIII to Blue.

A natural color RGB image of the stars was created with 30 2-minute images, each through red, green and blue filters.
First I separated the stars from the RGB image and tossed the RGB nebula out. I then separated the stars from the HSO image and used those stars as a luminance image for the RGB stars.

New Mexico Imagers

Please note: The following tables are updated every 24 hours.

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	7874407
PixInsight job	7L2Y2IEMHWF8MRLQS9R0D0J5191TBAGZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m07s.335
RA (top/left)	20h10m54s.344
RA (top/right)	20h11m29s.918
RA (bottom/right)	20h13m19s.942
RA (bottom/left)	20h12m45s.500

Dec (center)	+38°21′31″.53
Dec (top/left)	+38°33′29″.73
Dec (top/right)	+38°04′23″.62
Dec (bottom/right)	+38°09′30″.82
Dec (bottom/left)	+38°38′38″.52

Image Index:

Contribution Index (beta):

NGC6888 The Crescent Nebula in Cygnus

NGC6888 The Crescent Nebula in Cygnus

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC6888 The Crescent Nebula in Cygnus

NGC6888 The Crescent Nebula in Cygnus

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information