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 of H-Alpha
6 x 10 min each of RGB
Acquired with CCDSoft5
Darks, Flats, Alignment and Sigma Reject combine in Maxim
Further processing in PS CC

Click on the image to see it 3x this resolution and to resize it in the browser.

Click HERE to see the H-Alpha data only.

Flesherton, Ontario
June 2014

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