Shark Nebula in Cepheus (Lynds Dark Nebula 1235) by Andrea Girones (2021-11)

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Observer: 

Acquired near Ottawa.
118x180s Lights (almost 6 hours)
Celestron 11inch Edge HD scope
Hyperstar reducer 540mm at f/1.9
No filters
asi2600mcpro camera
  Gain 100 -10
Guided on the CGEM
Calibrated and processed in Pixinsight