The Leo Triplet, or the M66 Group, is a group of interacting spiral galaxies located in the northern constellation Leo. The group consists of the galaxies Messier 65, Messier 66 and NGC 3628, also known as the Hamburger Galaxy. The Leo Triplet lies at an approximate distance of 35 million light years from Earth.
The three galaxies in the M66 Group have all been affected by gravitational interactions with each other. This is evident in the deformed, drawn out spiral arms of M66 that are experiencing a high rate of star forming activity and in the warped, inflated disk of NGC 3628. With a prominent tidal tail consisting mainly of young blue stars, NGC 3628 seems to be the most affected of the three, while M65 appears to have suffered the least damage from the interaction. The tidal tail of NGC 3628 spans over 300,000 light years, but is very faint and does not always appear in images of the galaxy. https://www.messier-objects.com/leo-triplet/

The data of this image was acquired by Maurizio in March and April of 2021.

Always in the search and experiment, in that opportunity he used for several nights ISO 800-1000-1250.  We concluded after the process,  maybe that choice down the possibility to get more signal as the optimal dynamic range of the camera is around ISO 1600-3200.

The process was straightforward,  in both stacked programs Deep Sky Stacker and Siril.  The sessions with filter Enhance and Extreme was processed only in Siril, stacked normal and extraction of [OIII] and Ha, but in the end it was not used those stacks, only the normal RGB.

Three different stacks were blended in PS after had been worked its levels, arcsin curves, gradient pollution from L-Pro and Enhances/Extreme filters.  Just for the fun I used StarNet++V2 and StarExterminator and blended the stars of each one from the L-Pro stacks.

By the quantity of hours acquired we would expect more faint details in the tidal extension of the Hamburger Galaxy, but didn't happen. We are pleased with the details in the galaxies I liked a lot how they show up in the end of the process.

We Hope you liked too and thanks for coming to see the image.

As a side note, the new version of StarNet++ V2 is very nice and give a clean image.  With the typical Newtonian spikes on the big stars, let more or less the same situation but with less 'evidence'.  Wonderful with the rest, the improvement is impressive.  As usual with both programs be aware that some parts of the nebula or galaxies that are bright can be toked as 'star' and is washed out from the object.

Processed Feb. 7-14, 2022

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