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]
STL11000 w Astronomik 6nm
H-Alpha
filter
AP155 EDF F/7 w Robofocus
13 x 30 min self-guided on an AP900GTO mount
Acquired with
CCDSoft5
Additional hot pixel removal and column repair in CCDOps
Darks, Flats, Alignment and Sigma Reject combine in Maxim
Levels and Curves
in CS4
Click on the image to see it 2x this resolution and to resize it in the
browser.
Flesherton, Ontario
Nov 7/8 2009
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