CTB1, Supernova remnant

This really faint object is also known as Abell 85 or as SNR G116.9+00.1. It's located in constellation Cassiopeia. (Ra 23:58:53.5 Dec +62:30:28)

Abell 85 is an large, filamentary supernova remnant with shell-like structure similar to Cygnus Loop. Unlike the Cygnus Loop, the majority of CTB1's optical light emission is in the HII spectrum, with only a small component of OIII emission. (deepskypedia)

This is a frustrating target!! Extremely faint and now located low in the Norhern sky. I have plans to continue with this one but the next possible time is in late August when it's dark again and this will be higher in the sky.

Here's 7h 30min of Hydrogen-alpha taken with 30min subs.