LBN 576, also known as Abell 85 or CTB-1, is an extremely diffuse supernova remnant located in the constellation Cassiopeia.
For this image, I mainly wanted to highlight the OIII signal, brought out with 30 hours of exposure using the OIII filter, in order to create a slightly different rendering, along with some work on the S channel to bring out the filaments of the gas “ball.”
Telescope: Takahashi FSQ-106EDX4
Camera: Player One Astronomy Astronomy-M Pro
Mount: ZWO Astrophotography AM5
Accessories: Player One FHD-OAG MAX · Player One Phoenix Wheel 7x36mm
Filters: Antlia SHO (3nm) + RGB
H: 177 x 600s
S: 158 x 600s
O: 183 x 600s
RGB: 3 x 30 x 60s
Total: 88h
Software:
Adobe Photoshop · PixInsight · Siril · GraXpert
Full details: https://www.astrobin.com/kakuut/C/