Urban Cave Nebula (SH2-155)

Here is another urban image taken from my driveway taken using an Optolong L-eNhance filter. This is also the first test image from a new camera, a Zwo ASI2600MC-Pro. According to Wikipedia -  Sh2-155 (also designated Caldwell 9, Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth. Click on the image to see a higher resolution version, then click again on the image to return to this page.

Object SH2-155  Object RA 22:56.9 Dec +62:37 Date 9 November, 2020 Exposure 180 minutes (18 X 10 minutes) Conditions Bortle 7 skies, high light pollution levels. Gain 100 Camera Zwo ASI2600MC-Pro Optics Prime focus of a  SkyWatcher Esprit 120 f/7 APO refractor with a focal length of 840 mm Filter Oplolong L-enHance Location Bedford, Nova Scotia Processing This image was captured using Sequence Generator Pro, telescope control provided by Mosaic Engine and processed entirely in Images Plus.  Arcsinh stretch, crop, masked noise reduction and deconvolution to sharpen the result.  Multi-point flatten used to remove gradient and balance the background.