M33 (Triangulum Galaxy) September 2023 (Fabian Butkovich)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: HD9269 · HD9483 · IC 131 · IC 132 · IC 133 · IC 135 · IC 136 · IC 137 · IC 142 · IC 143 · M 33 · NGC 588 · NGC 592 · NGC 595 · NGC 598 · NGC 604 · Triangulum Galaxy · Triangulum Pinwheel

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M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

Powered byPixInsight

M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

This wonderful image of M33 is actually comprised of two different imaging sessions at different focal lengths (400mm & 600mm), of which I integrated together in Adobe Photoshop using smart object blending mode. The outcome is a truly breathtaking rendition of one of the most captivating objects in our night sky.

A post-processing task I frequently encounter when working with astro images is color correction. My images tend to exhibit hue shift of many colors, perhaps attributed to light pollution or the way my ZWO ASI183 renders tones. For instance, in this photo of M33, the nebulosity surrounding the spiral arms appeared violet initially, however, many other images of M33 showcase a more subtle, pale-blue hue for the galaxy.

Nonetheless what I'm really excited about is combining imaging data from year-to-year now that I have a reliable imaging setup where I can consistently capture near-identical data sets time and time again.

If anyone is curious as to why I blended two different focal length stacked images together, it is because I wasn't too pleased with the quality of stars in my longer focal length image and also I wanted to use a widefield version to create an animation for instagram, therefore I set out to capture another session at 400mm and combine them.

Original
Final
B

B

Title: 2024 Re-Edit

Description: I shifted the colors to move the blue towards the purple and magenta hue versus the previous cyan. I also used color range select in Photoshop to desaturate or (neutralize) the background, a trick which I hadn't ever considered in my processing workflow up until now. I also used the same method to selective reduce noise on only the shadows creating a smooth sky.

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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
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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
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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	9116951
PixInsight job	3YG4GMQH0PFL12I2YH2XE1Z5E6VLT9SD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m47s.90
RA (top/left)	01h36m53s.74
RA (top/right)	01h36m19s.65
RA (bottom/right)	01h30m41s.19
RA (bottom/left)	01h31m17s.83

Dec (center)	+30°40′21″.6
Dec (top/left)	+30°19′44″.0
Dec (top/right)	+31°11′29″.8
Dec (bottom/right)	+31°00′48″.7
Dec (bottom/left)	+30°09′02″.5

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M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

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M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

M33 (Triangulum Galaxy) September 2023

Revision title: 2024 Re-Edit

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