Strange alignment of stars in a circle

http://legacysurvey.org//viewer/?ra=102.8046&dec=32.5341&layer=dr8-north&zoom=11

Asterisms are, I think, surprisingly common. The magazine Sky&Telescope has had many articles, over the years, on asterisms, of many kinds and scales …

I suppose if you look at a bunch of stars long enough you are bound to start seeing things!