The Crescent Nebula (Bogdan Borz)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD228152 · HD228153 · HD228186 · HD228205 · HD228243 · HD228304 · HD228324 · HD228376 · HD228409 · HD228410 · HD228411 · HD228424 · LBN 203 · NGC 6888 · Sh2-105

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The Crescent Nebula

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The Crescent Nebula

The Crescent Nebula is an emission nebula situated in the Cygnus constellation, at around 5000 ly from Earth (Wikipedia). It is shaped by the strong winds from the central Wolf-Rayet star 136. It has an outer oxygen shell visibile as a blue halo around the nebula. The star loses a mass equivalent to our Sun every 10,000 years.

The palette was the result of multiple trials and errors. I am convinced by now that the 3nm Ha filter is too narrow for some nebulae (especially planetary) since it misses the N signal captured by a 5 or 7nm filter. I made the first test with the NoiseXterminator Pixinsight plugin, a pretty satisfactory one. Of course, visual check is very important for avoidance of detail destruction. But it leaves very few artifacts and is probably its strong point. I also used deconvolution on both narrowband data sets in order to increase the details and it was useful even on the Ha (probably due to my backyard seeing).

Imaged on 9 nights between May 30 and June 20th 2022.
Ha 121 x 300s
OIII 106 x 300s

Light Polluted skies
Fine Art Astrophotography
AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)
Narrowband imaging
PixInsight Addicts
AstroBin Platform open discussions community forum

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	5914838
PixInsight job	HRXG5ONC0C52FOFL2OL0QM4KP53XM2KZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m12s.842
RA (top/left)	20h13m20s.320
RA (top/right)	20h10m05s.905
RA (bottom/right)	20h11m05s.976
RA (bottom/left)	20h14m19s.484

Dec (center)	+38°20′53″.11
Dec (top/left)	+38°42′22″.32
Dec (top/right)	+38°25′00″.67
Dec (bottom/right)	+37°59′22″.73
Dec (bottom/left)	+38°16′38″.43

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The Crescent Nebula

The Crescent Nebula

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The Crescent Nebula

The Crescent Nebula

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