Sh2-155 aka Caldwell 9 aka The Cave Nebula

The Cave Nebula

The Cave Nebula in Cepheus

The Cave Nebula, Sh2-155 or Caldwell 9, is a dim and very diffuse bright nebula within a larger nebula complex containing emmison, reflection, and dark nebulosity. [Wikipedia]

Scope: Planewave 12.5" CDK
Camera: Apogee U16M w Astrodon GenII H-Alpha filter
Mount: Paramount ME guided w Astrodon MMOAG and SBIG ST-402ME
24 x 30 min 
Acquired with CCDSoft5
Darks, Flats, Alignment and Sigma Reject combine in Maxim
Further processing in PS CC

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Flesherton, Ontario
June 2014