Finally there was a nice weather and no Moon. Summer nights are short; therefore it’s not optimal for deep space objects, which require very long integration time. Therefore I pointed my telescope this evening to globular cluster M3.

This cluster is located in constellation Canes Venatici and it’s one of the largest known clusters, because it contains around 500 000 stars.

Technical details:

Telescope:Newton 254/1000 mm
Aperture:254 mm
Focal length:1000 mm
MountGemini G53f
AutoguidingZWO 174MM, TS 60/240 mm
Camera:Mii G2 8300
Corrector:Explore scientific CC
Filters:Baader LRGB
Exposure:16xL 180s bin 1x1, 8xRGB 120s bin 2x2