Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 2959  ·  NGC 2961  ·  NGC 2976  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077  ·  PGC 213630  ·  PGC 213665  ·  PGC 2703724  ·  PGC 2705667  ·  PGC 2706680  ·  PGC 2707619  ·  PGC 2708107  ·  PGC 2708458  ·  PGC 2708570  ·  PGC 2709184  ·  PGC 2711212  ·  PGC 2715461  ·  PGC 2719634  ·  PGC 2719935  ·  PGC 2720796  ·  PGC 2721118  ·  PGC 2722319  ·  PGC 2723482  ·  PGC 2723612  ·  PGC 2723731  ·  And 88 more.
The M81 Galaxy Group, Björn
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The M81 Galaxy Group

The M81 Galaxy Group, Björn
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The M81 Galaxy Group

Equipment

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Acquisition details

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Description

This is the last image of a series of images where I was able to collect data and process it in week 2 of 2024. The other objects are going to be mentioned and linked in the subsequent description.

My imaging sessions usually were designed to collect data for about two to three hours of a high object before it transits (that was the case for NGC 1499 California Nebula as well as the IC 405, The Flaming Star Nebula). Right after, I was going for typical winter objects (Caldwell 49, Rosette Nebula and Barnard 33 and NGC 2024, Horse in Flames) as they have now reached an altitude which allows some imaging (although 30 degrees isn't a lot). As those objects remain fairly low for my latitude, I couldn't capture data all night until astronomical dawn. Therefore, I didn't want to call it a night and was looking out for another target. Maybe due to a lack of creativity or whatever, I've ended up doing a wide-field of the M81 group of galaxies. Whenever I think of the members of this group, a larger FL scope crosses my mind. Nevertheless, I am happy that I've attempted that region of space. Although I've collected ten hours worth of data, I wasn't able to pull out the contrast in the background showing the interstellar medium.
On the positive side however, I was able to show every known PGC object in that field. After the initial advanced plate solve, I've realised that some clearly noticeable galaxies weren't highlighted and was wondering if they weren't part of the NGC. Obviously, they're not and so I've turned o the PGC annotation as well and from what I can see, all objects are brighter than the sky background and therefore visible.

I am very surprised to read about the amount of galaxies being part of that group. From the image, one would think that maybe a handful of galaxies might be part of it - a few (apparently) smaller ones besides M81 and M82. After all it seems to be certainly more than a dozen and apparently a few dozens of galaxies (depending on the source). Considering the fact that this group is still called local even being around (10MLy) away indicates how much there is in this universe.

Feel free to comment!

Björn

* This image was not and will not be submitted for IOTD consideration

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