CTB 1 (Abell 85) is a faint supernova remnant (SNR) in the constellation of Cassiopeia.
CTB 1 is approximately 10000 lightyears away and spans about 100 lightyears in diameter.
It is dated to be 10,000 years-old.

It is extremely dim and difficult to image - it took a very fast telescope (10" F2.8)
Even then, I had to use bin 2 for the Ha data.

Ha-RGB image

Telescope - ASA 10" F2.8
Mount ASA DDM 60
3" ASA X0.73 reducer
Moravian G3-16200 camera
Baader 2" filters

Hydrogen Alpha - 15 Hrs (Bin 2) - AS luminance
RGB - 30 min each (For star color)

Total about 17 Hrs - NO guiding

Imaged from my home in Gan-Yavne, ISRAEL