NGC6888 - Crescent Nebula (Michael & Jon Norman)

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

Powered byPixInsight

NGC6888 - Crescent Nebula

Link: https://www.instagram.com/nonjorman/

Powered byPixInsight

NGC6888 - Crescent Nebula

Link: https://www.instagram.com/nonjorman/

NGC6888, the crescent nebula, is a wind blown bubble of ionized gas located within the Cygnus constellation. Being an emission nebula, the red and cyan colours map back to ionized hydrogen and oxygen respectively. The energetic source for the observable ionization in the crescent nebula can be traced back to the central Wolf-Rayet star (WR 136). WR stars are extremely large stars, late in the stage of stellar evolution that are ejecting material at a very high rate. As this material radially expands, it collides and subsequently ionizes previously ejected gas resulting in the observable ionization nebula.

This data is a little old, and a little rough around the edges - particularly the Ha. Part of dialing in the QHY600/CDK17 setup involved a little camera experimentation. Our initial settings were gain 0, extended full-well mode. This achieved the goal of maximizing full well but the 11e- read noise was accidentally overlooked. As a result - even the 11+ hour Ha stack was very noisy and has some periodic banding as well. Switching to the current high-gain, gain 0 mode has significantly helped decrease the noise as well as maintain a sufficient full-well. Considering trying out the 2cms mode shortly, seeing lots of positive results!

QHY Users Group

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	5431568
PixInsight job	8FTA81O714F6A6RQEAMT5Q0YWGHFSHK6
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m08s.812
RA (top/left)	20h13m37s.604
RA (top/right)	20h10m40s.486
RA (bottom/right)	20h10m40s.629
RA (bottom/left)	20h13m36s.582

Dec (center)	+38°20′21″.56
Dec (top/left)	+38°32′44″.22
Dec (top/right)	+38°32′48″.17
Dec (bottom/right)	+38°07′58″.25
Dec (bottom/left)	+38°07′52″.33

Image Index:

Contribution Index (beta):

NGC6888 - Crescent Nebula

NGC6888 - Crescent Nebula

Equipment

Acquisition details

Description

Comments

Acquired at

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC6888 - Crescent Nebula

NGC6888 - Crescent Nebula

Equipment

Acquisition details

Description

Comments

Acquired at

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