Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling) (Ian Parr)

Celestial hemisphere: Southern · Constellation: Hydra (Hya) · Contains: M 83 · NGC 5236 · Southern Pinwheel Galaxy

Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling), Ian Parr

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Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

Powered byPixInsight

Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

Messier 83, known as the Southern Pinwheel Galaxy and NGC 5236, is a massive, grand design spiral galaxy approximately 15 million light-years away in the constellation borders of Hydra and Centaurus. It is one of the closest and brightest barred spiral galaxies in the sky, and is visible with binoculars. Apparent magnitude is 7.6 and is arounf 12′.9 × 11′.5 arcminutes in size.
I haven't been able to image anything for a month. The new moon has sailed past unmolested and it is currently bucketing rain. So what is a fustrated astro imager to do but play with old data in the latest version of Pixinsight and the latest tools and techniques gleaned from YouTube videos and just throw everything at it and see what sticks to the wall.
So I ruthlessy hacked 19 hours of RGB Data back to 6.25 hours in sub-frame selector and took another run at it.

It seems like every week I find out something new and wonderful and my entire workflow gets re-written.

In this case after applying BlurXterminator correction apply GraXPert to each seperate channel before combining (as the GraXpert AI was only trained on linear channel data).
Then once combined, apply SPCC and/or the amazing new Auto Linear Fit by Juergen Terpe (his SelectiveColorCorrection script is alaso amazing!), Then BlurXTerminator Star Reduction and Non-Stellar sharpeing before splitting into Stars and Starless. Only then use Generalised Hyperbolic Stretching. Dark Rangers Inc on YouTube has the best run through on the GHS Dark To Light method I have seen. Although it deals with Narrow Band and I would add that for RGB the initial stretch can use Colour Mode.

So we live in interesting times and the trick with all these powerful new weapons is to not shoot ourselves in the foot (or worse) but it certainly helps make up for the appalling weather.

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	Basic success
Started	...
Astrometry.net job	9053128
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

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Contribution Index (beta):

Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

Messier 83 The Southern Pinwheel Galaxy in RGB (Once more with feeling)

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