Nebulae - celestialpixels
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Cave Nebula - SH2-155

Cave Nebula - SH2-155

The Cave Nebula, Sh2-155 or Caldwell 9, is a dim and very diffuse bright nebula within a larger nebula complex containing emission, reflection, and dark nebulosity. It is located in the constellationCepheus.

Visually it is a difficult object, but with adequate exposure, makes a striking image. The nebula gets its name from the dark lane at the eastern side abutting the brightest curve of emission nebulosity which gives the appearance of a deep cave when seen through a telescope visually.

Telescope: Officina Stellare Veloce RH200 @ f/3
Mount: Astrophysics Mach1 GTO
Guiding: TS-OAG9 / Lodestar
Camera: ATIK 383L+ Mono
Filters: Baader LRGB
Total Exposure: 6 h
Subexposures: LRGB (5min)
Location: Mt Parnon / Aug 2012

Cave NebulaSH2155