M31 - Andromeda Galaxy 9-2022 - RGBHa (scottacrosby)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: 35 And · Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224 · The star ν And

M31 - Andromeda Galaxy 9-2022 - RGBHa, scottacrosby

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M31 - Andromeda Galaxy 9-2022 - RGBHa

Powered byPixInsight

M31 - Andromeda Galaxy 9-2022 - RGBHa

Notes: This is my fourth time shooting this image but my third time publishing it. I shot this in mono with my ASI2600MM and 3nm Optolong Filters mounted on a new Askar FRA600 with the .7 reducer. The reducer brings it down to 420mm from its native 600mm focal length, but it speeds it up to f/3.92. I shot 180 second subs for Red, Green, Blue, and Ha at 3nm band pass.

I shot this over a couple of days, weather permitting, and processed it in RGBHa Palette in Pixinsight with slight adjustments in Lightroom.

Astro Pixel Processor Workflow:
0. Defaults
1. Single Session Processing: Sorting frames: quality
2. Checked create 32-bit Masters
3. 500 stars
4. Defaults
5. Defaults
6. Lights to stack 90%, integrate Average, filter Winsorized Rejection, LNC Degree. 2nd degree, x2 Drizzle

PixInsight Workflow:
I've done a lot of experimenting with new processes on this image; mainly GHS, NoiseXTerminator, and AstroSwell's Star De-emphasizer.

Dynamic Crop on Ha
StarAligment of all images to Ha
NoiseXterminator .60 Denoise / .15 Detail in Linear mode; all images
Linear Fit Images to Red
PixelMath to pull Ha out into a new image with the following expression ((Ha*80)-(Red*3))/(80-3)
PixelMath to Put Ha from new image into Red Image with the following expression $T+(new_Ha-Med(new_Ha))*3
Combine Red, Green and Blue
GerneralisedHyperbolicStretch to adjust Histogram, curves, saturation, and colors
StarXTerminator
DarkStructureEnhance Script
PixelMath to place stars back in the image
AstroSwell's Star De-emphasizer script
Lightroom for final cropping and level adjustments

Original
Final
B

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	6867130
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M31 - Andromeda Galaxy 9-2022 - RGBHa

M31 - Andromeda Galaxy 9-2022 - RGBHa

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Contribution Index (beta):

M31 - Andromeda Galaxy 9-2022 - RGBHa

M31 - Andromeda Galaxy 9-2022 - RGBHa

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