Messier 55 is a globular cluster located in constellation Sagittarius. M55 is one of the closest globular cluster, having distance from the Solar System only 17’600 light-years, compared to M54, which is one of the furthest globular clusters (86’400 light-year). I managed to capture these two clusters during single night.

Technical details:

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length660 mm
MountiOptron CEM25P
AutoguidingQHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
CameraZWO 071 Pro @-10C
CorrectorExplore Scientific HR coma corrector
FiltersAstronomik L-1 - UV IR Block Filter
Exposure37x120s, Gain 134, bin 1x1,