My deepest capture of M13 so far

[Menno555]

Out of the blue there was a clear night 2 days ago. Here also SO much clouds the last few months, so it was a rare sight
Also took a set of captures of M13. Somehow I do a short session of M13 each year.

So this is data from 2021, 2022 and 2023. Not much, just a bit over 2 hours.
30sec exposures for the core, 180sec exposures for the outer parts: the core is not overblown now while at the same time the outer parts have a lot of stars.

Menno

M13-2023sm.jpg (493.1 KiB) Viewed 7233 times

Bortle 6/7
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Baader IR/UV Cut filter
Zwo ASI071MC Pro camera

Captured with SharpCap Pro @ -10 Celsius / White balance R50 B50
2021: 100 x 30 sec / Gain 90 / Offset 20
2022: 50 x 30 sec / Gain 90 / Offset 10
2023: 17 x 180 sec / Gain 0 / Offset 4
Each set 20 x darks, 50 x flats and 50 x darkflats

Stacked with SiriL and Sirilic

Processed with Siril and Photoshop
Siril: Background Extraction and Histogram
Photoshop: Levels, Camera Raw Filter (blacks, color saturation, clarity, curves), tiny bit of noise reduction with NoiseXterminator

[turfpit]

Menno

A decent globular cluster - stars defined in the centre and colours in the outer stars. A good return on 2h of capture.

Dave

[Menno555]

Thanks Dave.
This is one of those case wondering what more integration time will bring

Menno

[timh]

That is an excellent image Menno. Well resolved with good colour as well as deep.
Tim

[kaymann]

I really like this image!