Sharpless 91 (LBN 147) is a faint nebula located approximately 2,500 light-years away in Cygnus.
Ha – 25x1800s – 750 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
870 minutes total exposure – 14 hours 30 minutes
Imaged from Dardenne Prairie, Missouri (a red zone) over seven nights in September, 2018 and July, 2019 with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
HaRGB - https://www.flickr.com/photos/dcrowson/48447955342/sizes/l