The Cave Nebula (Sh2- 155 or Caldwell 9) is an emission nebula of the Cepheus constellation.
It is a weak light nebula and very diffuse in a greater complex of nebula containing dark emission, reflection and nebulosity. It is located in the constellation of Cepheus and is about 2400 light years from Earth.
Acquisitions with NINA
344 x 300 s i.e. 28 H40
ASKAR 400 bezel
ASI200MC
SIRIL stacking
Pixinsight and Photoshop treatment

Copyright Fred Lamagat

Image Description and Details : Sh2-155 or Sharpless 155 is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. Images showing a curved arc of emission nebulosity corresponding to a cave mouth (roughly center of image) gives rise to the popular moniker "Cave Nebula". Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 2400 light-years from Earth.

Capture info:

Location: Orion’s Belt Remote Observatory, Mayhill NM, USA
Telescope: Takahashi 180ED reflector
Mount: Paramount MX+
Camera: SBIG STXL 16200
Data: 4.75,4.25,4,4.75,4.5 hours LRGB , Ha respectively
Processing: Pixinsight



Copyright: David Doctor