https://www.legacysurvey.org//viewer/?ra=22.0030&dec=2.4086&layer=ls-dr9&zoom=16
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Welcome 
I think that is a relatively bright pair of stars. If you look in the overlay menu, under Imaging Catalogs, there’s a “Gaia EDR3” overlay. This shows stars (and some other things!) measured by the Gaia satellite launched by the European Space Agency. It measures the motions and distances of stars – here, it looks like Gaia detected two stars (which you can sort of see above), and they’re moving in the same direction - they seem to be kind of twin stars.
In these images, they’re very bright, and they saturate the detectors - they’re too bright for us to get good measurements of exactly how bright - so the software kind of panics and treats them as zeros, and you get that weird dark-blue outline and weird colors in the cores.
cheers,
dustin
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