M 3 (NGC 5272) globular cluster in Canes Venatici

 Posted: Mar 25th, 2025
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Technical Info
Telescope/Lens: Askar SQA 85 мм f/4.8
Camera: ZWO ASI 2600 MC
Mount: Ioptron HAE 29 C
Guide Scope: Askar 52 мм F4
Guide Camera: ZWO ASI 120 MM mini
Software: SharpCap 4.0, DSS, Siril
Exposure:
48 x 180" ISO/Gain: 100
Orange zoneLight Pollution:
 Petushki Vladimirskaya Oblast, Russia
 Mar 25th, 2025
2 h 24 m
789
M 3 is one of the largest and brightest globular clusters.
It contains about 500,000 stars.
It is located at a distance of 33,900 light years.
Apparent size 38'.
Discovered by Charles Messier on May 3, 1764.
Under favorable observing conditions, it can be visible to the naked eye.
Resolution: 1876x1401 px
Scale: 590 KB
Updated
  28 Mar, 2025
  2 h 24 m
Обработана в Pixlnsight Олегом Новоселовым, за что ему отдельное спасибо! В итоге получилось совсем другое видение, где больше раскрыты возможности трубы.
Current photo
  25 Mar, 2025
  2 h 24 m
M 3 является одним из самых крупных и ярких шаровых скоплений. Содержит около 500 000 звёзд. Находится на расстоянии 33 900 св. лет. Видимый размер 38'. Открыто Шарлем Мессье 3 мая 1764 года. ...
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Comments

Alexey! Something's not quite right, this telescope shouldn't be drawing like this... I can't find online whether it has a UV/IR filter or just a protective glass? And have you tried shooting with filters on it at all?
25 Mar, 2025 Reply
Ryjov Aleksey Replied to Oleg Novoselov
I don't know, Oleg, there's definitely no filter in the telescope, but the ZWO 2600 MC camera has a built-in IR CUT filter. Maybe I'm missing something though. I don't have much experience, so I'd be glad if you could give me some advice.
25 Mar, 2025 Reply
Ryjov Aleksey Replied to Ryjov Aleksey
Maybe it's due to my clumsy processing—I processed it in Siril, separating the stars using Starnet. Perhaps I shouldn't have done that; maybe I should have extracted the background, color-calibrated, and simply stretched the histogram?
25 Mar, 2025 Reply
Oleg Novoselov Replied to Ryjov Aleksey
Upload the stacked and single frames to the cloud, I'll take a look.
25 Mar, 2025 Reply
Ryjov Aleksey Replied to Oleg Novoselov
https://disk.yandex.ru/d/EBDdpsFaPfJQAQ
25 Mar, 2025 Reply
Ryjov Aleksey Replied to Ryjov Aleksey
Here is the loner
https://disk.yandex.ru/d/kiTLyv4niyz5_A
25 Mar, 2025 Reply
Oleg Novoselov Replied to Ryjov Aleksey
I checked it at work, the telescope is a beast!!! Something happens during stacking.
Here's a link to https://cloud.mail.ru/public/ywnj/SExePWKXF
Probably need to look into switching to PixInsight.
Also, I would try installing a UV/IR cut filter or some similar broadband filter. I've read that the built-in filter in some ASI cameras isn't very good.
26 Mar, 2025 Reply
Ryjov Aleksey Replied to Oleg Novoselov
Thanks for your help, Oleg! Overall, the issue might be with the stacking, and regarding the filter, yes, I need to think about it. The telescope is good, no problems with it, that's clear. I'll check out the link! One more question related to this: Would you like to try processing my raw file in PixInsight? I'm really curious to see what the difference would be.
26 Mar, 2025 Reply
Oleg Novoselov Replied to Ryjov Aleksey
I'll probably try tomorrow. Of course, it would be nice to stack it myself, but I won't download it over mobile internet—I'd get tired.
26 Mar, 2025 Reply
Ryjov Aleksey Replied to Oleg Novoselov
Thank you! I think the issue isn't with stacking; you've already processed one of my raw files, and the result was excellent.
26 Mar, 2025 Reply
Oleg Novoselov Replied to Ryjov Aleksey
I put this together quickly, you can upload it to the hosting so there's an example of the telescope's resolution, the scope is fire.
https://cloud.mail.ru/public/dPux/jUZokFV3k
27 Mar, 2025 Reply
Ryjov Aleksey Replied to Oleg Novoselov
Thank you, Oleg! Yes, it turned out great; you can probably only achieve that in PixInsight, and of course, with experience. Today I posted Markarian's Chain after final processing—I used GraXpert, and I think it came out pretty well.
27 Mar, 2025 Reply

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