Sharpless 152 (LBN 519 and others) is the smaller nebula next to the larger Sharpless 153 (LBN 518 and others). Both of these are located in the top corner Cassiopeia.
Ha – 27x1800s – 810 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
930 minutes total exposure – 15 hours 30 minutes
Imaged over seven nights in August and September, 2017 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
HaRGB - https://www.flickr.com/photos/dcrowson/37224158026/sizes/l
A larger field of view, annotated image can be seen here - https://www.flickr.com/photos/dcrowson/23952449191/sizes/l.