Messier 33 - The Triangulum Galaxy - a second attempt (Cosgrove's Cosmos (Patrick Cosgrove))

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: 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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Messier 33 - The Triangulum Galaxy - a second attempt

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Messier 33 - The Triangulum Galaxy - a second attempt

M33, also known as NGC 598, or more commonly known as either the Triangulum Galaxy, is located 2.73 Million Light Years away and is the third largest member of the local group of galaxies which includes M31 the Andromeda Galaxy and our own Milky Way. It is a spiral form galaxy - once of the first spiral galaxies identified as such back in 1850. It is one of the most distant objects that can seen with the unaided eye.

I shot my first version of this about a year ago and I recently revisited it and I very pleased with the improvements on this one. What caused those improvements? Well time and experience - of course, but this one has an integration that is 3x what the first one had - along with better composition and an autofocus routine that kept things sharp through the whole capture sequence which spanned two evenings.

This image is the result of 130x150 sec exposures for a total integration time of about 5.5 hours.

Image details:

130 x 150 seconds, bin 1x1 @ -15C

50 Bias exposures

25 Dark exposures bin 1x1 @ -15C

50 Flats

Hardware:

Scope: William Optics 132mm FLT F/7 APO

Guide Scope: Apterna 60mm

Camera: ZWO ASI294MC-Pro

Guide Camera: ZWO ASI290Mini

Focus Motor: Pegasus Astro Focus Cube 2

Field Rotator: Pegasus Astro Falcon

Mount: Ioptron CEM60

Polar Alignment: Ioptron Ipolar integrated alignment cameras

Capture Software:

Capture Software: PHD2 Guider, Sequence Generator Pro

Image Processing:

Stacking: Deepsky Stacker

Image Processing: Deepsky Stacker, Pixinsight, Photoshop, Coffee, extensive processing indecision and second guessing, editior regret and much swearing…..

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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	3888123
PixInsight job	JOSO1GCXMCV3RZXD1X93HUAD0VU203OX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h33m58s.81
RA (top/left)	01h32m38s.19
RA (top/right)	01h32m10s.68
RA (bottom/right)	01h35m18s.51
RA (bottom/left)	01h35m47s.99

Dec (center)	+30°38′50″.6
Dec (top/left)	+31°11′18″.5
Dec (top/right)	+30°10′22″.1
Dec (bottom/right)	+30°06′17″.8
Dec (bottom/left)	+31°07′11″.3

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Messier 33 - The Triangulum Galaxy - a second attempt

Messier 33 - The Triangulum Galaxy - a second attempt

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Messier 33 - The Triangulum Galaxy - a second attempt

Messier 33 - The Triangulum Galaxy - a second attempt

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