Possible gravitational lensing? Visible as a sign on SDSS as well

http://legacysurvey.org/viewer?ra=186.5856&dec=0.5884&zoom=16&layer=decals-dr7

Shape does look interesting, although not 100% arc-fit around the proposed lensing galaxy?

Others might judge it better.

http://legacysurvey.org/viewer?ra=186.5855&dec=0.5885&zoom=16&layer=decals-dr7-resid