Great Globular Cluster in Hercules M 13

googolplexplex

78406

Deep Sky

Dec 27th, 2024

1101

NGC 6205NGC 6207IC 4617

Resolution:: 6024x4020 px
File size:: 5660 KB

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Photo description / processing

Messier 13 globular cluster in Hercules (NGC 6205, GCL 45, Great Cluster in Hercules) Galaxy NGC 6207 Equipment and software: Camera Canon EOS 200 Da. Telescope Synta SkyWatcher 150/750, F/5 Mount HEQ-5 Pro Bahtinov mask Astrophotography Tool, EQ-Mode, ASCOM, Cartes Du Ciel Imaging session 1 from 12-13.09.2024, Kremenkoul area Red light pollution zone. Bortle scale class 7 101 Light frames of 10 seconds + 10 Dark frames + 10 Bias frames ISO 3200 Imaging session 2 from 22.11.2024, Kremenkoul area Red light pollution zone. Bortle scale class 7 157 Light frames of 15 seconds + 40 Dark frames + 40 Bias frames ISO 1600 Total integrated exposure Σ=0h56'5" Processing: DeepSkyStacker, FitsWork, FITStacker, Lightroom, StraNet2GUI, Photoshop, Topaz Denoise AI

Technical information

Telescope/Lens: Sky-Watcher 150/750
Camera: Canon EOS 200D (astro-modified)
Mount: Sky-Watcher HEQ5 Pro
Accessories: Bahtinov Mask
Software: Astro Photography Tool, DeepSkyStacker, Fitswork, FitStacker, Adobe Photoshop Lightroom, StraNet2GUI, Adobe Photoshop, Topaz DeNoise AI

Location: Chelyabinsk, Russia

Light pollution

Red, Bortle 7 zone

Date taken: Nov 21st, 2024

Exposure

101 × 10″ · ISO/Gain: 3200 · Nov 21st, 2024
157 × 15″ · ISO/Gain: 1600 · Nov 21st, 2024

Total exposure: 56 m

Comments

scuttum

Indeed. The downside of modified Canons is that when shooting star clusters (and not only), they heavily skew the color balance toward yellow-orange.

Dec 28th, 2024

googolplexplexReply to scuttum

There's a lot to consider there. I tried to normalize the white balance in FitStacker using the star's BV index as a reference, but it's tricky with this one. If you just look at it visually, I've seen processed versions of photos of M 13 with the blue region, the yellow region, and they all look noticeably different. Personally, I felt this version here looked best this way.

Dec 29th, 2024