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Not sure as the stars lie on a chip gap. Ghosts are explained here: http://www.andromedaproject.org/#!/guide/type/artifacts
I have marked this as a #ghost but I believe this could be an #asteroid. The object is not visible in the 'yellow' but is in the 'blue'.
Lower right corner (third of image?) appear to have yellow duplicates of blue stars. No B&W analogs for them.