This field in Ursa Major just contains a bunch of dust near the brightest star in the image - HD 78935 (HIP 45461, TYC 4382-1057-1 and others).
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged on February 17th and March 14th, 2018 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/39997200205/sizes/l