The Bubble Nebula (center) with the M52 open cluster (top) with a smaller open cluster CZ43 to the lower left of M52. NGC 7538 is at the bottom right.

This is 155 sixty second exposures (2 hr 35 min) taken with my ASI294MC and Zenithstar 73III. The only filter used is the Astronomik L-3 Luminance UV/IR filter. This was taken at Cattle Point.

Processed in PixInsight