Sharpless 239 (LBN 821 and others) is defined as a HII region but appears to be reflection nebulae (and Herbig-Haro objects - https://en.wikipedia.org/wiki/Herbig%E2%80%93Haro_object) located within LDN 1551. These are located less than two degrees from Aldebaran in Taurus. A paper from 1976 (http://articles.adsabs.harvard.edu/pdf/1976ApJ...206..443K) determines this one to be approximately 456 light-years away.
Luminance – 36x600s – 360 minutes – binned 1x1
RGB – 16x300s – 80 minutes each – binned 2x2
600 minutes total exposure – 10 hours
Imaged over eight nights in 2018, 2019 and 2020 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/50967447531/sizes/l/
See my ‘wide view’ image here - https://www.flickr.com/photos/dcrowson/50967525727/