Sh-155-The Cave Nebula. Narrowband. March 2025

Sharpless 155 is a diffuse nebula located in the constellation of Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity and is widely known as The Cave Nebula. It lies around 2,400 light years distant.

Imaged over 3 nights, 27th Feb, 1st Mar and 8th Mar 2025.

HEQ5 PRO

RedCat51 WIFD

QHY183C Gain21 Offest76 -20C

Optolong L-eNhance narrowband filter

40 x 900sec subs

Acquisition time 10hrs.

Processed using Pixinsight and Photoshop 6.

Done