Sh2-155 aka Caldwell 9 aka
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: AP155EDF w 4" Field Flattener and Focus Boss II motorized focuser
Camera: Moravian G4 w Astrodon Gen II filters
Mount: Paramount MX guided w an SBIG ST-402ME and Borg 60mm guidescope
22 x 20 min of H-Alpha
15 x 10 min each of RGB
Acquired with CCD-Commander and TheSkyX
Calibration and colour combine in PixInsight
Further processing including the blending of the H-Alpha into the RGB in PS CC
Click on the image to see it 2x this resolution and to resize it in the
browser.
Click HERE to see the
H-Alpha data only.
Lucknow, Ontario
June 2021
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