Cave-Nebula Area



S 155, also known as 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 constellation Cepheus. Visually it is a difficult object, but with adequate exposure, makes a striking image. The nebula gets its name Cave Nebula 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.

Imaging telescopes or lenses: Officina Stellare Veloce RH200
Imaging cameras: FLI Microline 11002M
Mounts: Astro-Physics Mach1 GTO
Guiding telescopes or lenses: Borg 45 ED
Guiding cameras: SBIG STV
Software: Maxim DL,  photoshop, ESA/ESO/NASA NASA Fits Liberator, GradientXterminator
Filters: B,  L,  R,  Astronomik Green
Resolution: 3000×2000
Dates: Oct. 1, 2011
Frames: 9×1200″ bin 1×1
Integration: 3.0 hours
Avg. Moon age: 4.07 days
Avg. Moon phase: 17.60%
RA center: 345.494 degrees
DEC center: 62.497 degrees
Pixel scale: 3.927 arcsec/pixel
Orientation: 0.466 degrees
Field radius: 1.966 degrees
Author: Astrojoe