LBN 35 is a HII region located in Ophiuchus.
Dolidze 27 is an open cluster consisting of the stars just to the left of LBN 35.
MBM 139, most of the rest of the dust in the image, is a cloud of IFN illuminated by our galaxy.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged on June 19th and 20th, 2022 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/52163878538/sizes/l/