M31 Andromeda Galaxy (Guillermo de Miranda)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: 32 And · 35 nu. And · Andromeda Galaxy · HD2993 · HD3396 · HD3431 · HD3447 · HD3741 · HD3765 · HD3827 · HD3969 · HD4143 · HD4174 · HD4267 · HD4322 · HD4479 · HD4501 · HD4669 · HD4902 · HD5285 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224 · The star 32And · The star νAnd

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M31 Andromeda Galaxy

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M31 Andromeda Galaxy

First time trying galaxy photography. I got into this hobby to mainly photograph galaxies, and M31 is a good target practice. Definitely had to jump through some hoops to process unfiltered subs, as my Bortle 8 skies cause a massive gradient in mere seconds. Making use of the strengths of different post-processing applications is a must, jumping between Pixinsight, SiriL and Photoshop. I suppose Pixinsight can do it all, but I'm not that competent with it yet to use it as my only post processing tool.

Anyway, I'm glad how this image turned out. As it was hot outside, it was an uphill battle against sensor noise but despite all that it turned out better than I expected. Never thought the blue colors would pop out at 30 second exposures! I might try this target through my L-eNhance to get some Ha-data, although I'm not sure how effective that will be at this focal length as the Ha-regions will appear quite small. We'll see.

Processing details:
Stacking and photometric color calibration in Siril. Cropping, background extraction, SCNR and histogram transformation in Pixinsight. Further stretching, camera raw tweaking in Photoshop.

Aperture on the Samyang was dialed back to f/3.5.

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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	5048417
PixInsight job	Q2QY7K75NA789NJK26A2NL9S71OBBXG0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m49s.37
RA (top/left)	00h45m53s.71
RA (top/right)	00h57m11s.91
RA (bottom/right)	00h39m28s.10
RA (bottom/left)	00h28m58s.45

Dec (center)	+41°10′44″.6
Dec (top/left)	+38°19′10″.3
Dec (top/right)	+42°20′20″.1
Dec (bottom/right)	+44°02′02″.5
Dec (bottom/left)	+39°54′41″.5

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M31 Andromeda Galaxy

M31 Andromeda Galaxy

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M31 Andromeda Galaxy

M31 Andromeda Galaxy

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