Quick and dirty Crescent (Andy Wray)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192041 · HD192078 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192422 · HD192443 · HD192444 · HD192537 · HD228185 · HD228186 · HD228205 · HD228243 · HD228260 · HD228262 · HD228289 · HD228304 · HD228311 · HD228324 · HD228376 · HD228389 · HD228409 · HD228410 · HD228411 · And 6 more.

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Quick and dirty Crescent

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Quick and dirty Crescent

I thought I would try a very quick and dirty process on the Crescent nebula. I used the weighted batch pre-processing tool in PixInsight to go all the way to creating master files, used linear fit on the RGB images and combined and then used the NBRGBcombination script to combine Ha and OIII. No other processing apart from one curve adjustment in Photoshop and noise reduction in AI-Denoise. It's not a very pretty result, but not bad for a practically zero-effort process. Also, very little imaging time (?3 hours).

I think this is a really quick way of assessing the data you have before spending a lot of time in post processing. In this case, I have nowhere near enough integration time (particularly on the OIII data) to create a decent image. Here's to more clear skies on this target.

[Update] I decided to use Starnet to remove the stars, which allowed me to boost the crescent and the red nebula. I used deconvolution on the star mask to reduce them just a tad and added the stars back in. Still a really quick fudge and the image looks better. Still need more imaging time though.

[Update] I decided to use stretched RGB image and Starnet v2 to create an RGB star mask and then create a starless HOO image using Starnet v2. I then combined the two. Much quicker and almost the same result.

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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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
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Star trails
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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.
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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	5475697
PixInsight job	D0RPSPZQIM4140LNSZ1LRTN25RA83GTC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m45s.16
RA (top/left)	20h11m13s.69
RA (top/right)	20h11m08s.70
RA (bottom/right)	20h14m15s.70
RA (bottom/left)	20h14m22s.12

Dec (center)	+38°26′56″.1
Dec (top/left)	+38°53′38″.8
Dec (top/right)	+38°00′57″.5
Dec (bottom/right)	+38°00′07″.2
Dec (bottom/left)	+38°52′51″.9

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Quick and dirty Crescent

Quick and dirty Crescent

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Quick and dirty Crescent

Quick and dirty Crescent

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