Sh2-225 (also known as LBN 778) is a faint emission nebula and H II region located in the constellation Auriga. It is situated within the Perseus Arm of the Milky Way. The nebula is estimated to be approximately 12,060 light-years (3,700 parsecs) away from Earth.
I found this to be a fascinating area. There are large bulges of Hii in the background. They are partially obscured by foreground dust. A bright patch of Hii is lit up in the middle. That bright bit is Sh2-225.
Often described as extremely faint, it appears near the more prominent supernova remnant Sh2-224 (the “Rice Hat” nebula). Some deep imaging suggests it may be part of a larger ring-like or ball-shaped structure obscured by dark nebulosity. Due to its low surface brightness, it is a difficult target for astrophotography.
Astrobin link for the acquisition details and annotated image.
