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Messier 13 (NGC 6205), the Great Hercules Cluster, is the brightest globular cluster visible from the northern hemisphere, located in the constellation Hercules. Distance estimates commonly range from about 22,000 to 25,000 light-years, and the cluster spans roughly 145 light-years, containing several hundred thousand stars, many of them among the oldest in the Milky Way at 11-12 billion years of age. Under sufficiently dark skies it is faintly visible to the naked eye as a hazy patch. M13 is a rewarding target for revealing a dense, resolved core of individual stars, requiring good seeing and sufficient focal length/resolution to avoid the core stars blending into an unresolved blob, with the cluster's characteristic âpropellerâ dust lanes sometimes visible in deep images.
[Source: Wikipedia, en.wikipedia.org/wiki/Messier_13]
Total image time was 9 minutes.
Messier 13 (NGC 6205), the Great Hercules Cluster, is the brightest globular cluster visible from the northern hemisphere, located in the constellation Hercules. Distance estimates commonly range from about 22,000 to 25,000 light-years, and the cluster spans roughly 145 light-years, containing several hundred thousand stars, many of them among the oldest in the Milky Way at 11-12 billion years of age. Under sufficiently dark skies it is faintly visible to the naked eye as a hazy patch. M13 is a rewarding target for revealing a dense, resolved core of individual stars, requiring good seeing and sufficient focal length/resolution to avoid the core stars blending into an unresolved blob, with the cluster's characteristic âpropellerâ dust lanes sometimes visible in deep images.
[Source: Wikipedia, en.wikipedia.org/wiki/Messier_13]
Total image time was 9 minutes.
| Moon Phase | Waning Crescent |
| Camera | Seestar S30 |
| Optics | 150 mm focal length, f/5, 30 mm aperture (APO triplet) |
| Filter | IRCUT |
| Binning | 1x1 |
| Stacking | StackingWizard, 55 frames |
| Date | 2026-07-09 |
