Messier 10 (M10), also known as NGC 6254, is a globular star cluster located in the equatorial constellation of Ophiuchus. It was first observed by French astronomer Charles Messier on May 29, 1764. Messier included it as the 10th entry in his catalog, describing it as a "nebula without stars".

Object: M20

Location: Portsmouth, UK

Mount: Alt Az

Bortle Scale: 7

Total Session Time: 1 Hour

Nights:       27th June 2024

Total Subs Used: 220 x 10 Subs

Seeing:  Clear

Fits Stacked: Siril

Post-Processing Steps

1. GraXpert - Background extraction and Denoise v2.0 

2. Siril - colour calibration, photometric colour calibration, removing green noise, colour calibration, histogram stretch, colour saturation.