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 from the dark lane abutting the brightest curve of emission nebulosity which gives the appearance of a deep cave when seen through a telescope visually.(WIKI)
Imaged with the Boren-Simon 10" F2.8 POWERNEWT Astrograph.
SBIG ST8300M with FW5 filterwheel with BAADER LRGB filters
LRGB with 60 min LUM and 4 min for each color total of 72 minutes.
Imaged from the NEGEV desert October 2011