Crescent Nebula (Thomas Fuchs)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192041 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD192537 · HD228066 · HD228067 · HD228077 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228198 · HD228205 · HD228243 · HD228261 · HD228262 · HD228277 · HD228289 · HD228290 · HD228304 · HD228311 · And 14 more.

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Crescent Nebula

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Crescent Nebula

Experimenting with crops on the RedCat 51. For this image I did 2x drizzle and then a resize of the image to about 35% which makes the pixel size match the Rayleigh limit. Used just two narrowband channels (H alpha and OIII) this time.

Process:

Drizzle (2x) on region in both Ha and O
Resample to about 35% of size, which approximates the Rayleigh limit
For both channels, generate a PSF image, split into stars and starless with StarXTerminator, deconvolve and recombine
Autostretch and delinearize
Run StarXTerminator again on both to extract stars in screened mode
Shrink stars in OIII (MorphologicalTransformation) to match size of Ha stars
Combine stars and starless image seperately (HOO)
Export as 16-bit TIFs
Combine stars and starless in Photoshop (screen overlay)
Camera Raw filter (mainly light & color mix) on starless to dial in colors
Small saturation/vibrance tweaks for stars, minimum filter to slightly shrink stars (0.3)
Various masks to neutralize background
Profit?

Deep Space

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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
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Star trails
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
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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	6085518
PixInsight job	H0A4O23FP0OLY49SW6KOZWRUDHUGO2X8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m11s.84
RA (top/left)	20h10m55s.89
RA (top/right)	20h09m21s.79
RA (bottom/right)	20h13m26s.80
RA (bottom/left)	20h15m02s.97

Dec (center)	+38°20′14″.9
Dec (top/left)	+38°53′05″.2
Dec (top/right)	+38°06′38″.7
Dec (bottom/right)	+37°47′20″.4
Dec (bottom/left)	+38°33′34″.8

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Crescent Nebula

Crescent Nebula

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Crescent Nebula

Crescent Nebula

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