I know I had posted a few similar green objects without really getting to the bottom of what they are. Possibly a variable star. This one seems to be bright green in DR9 and becomes more of a carbon green in DR10 &DR11. It only appears once in single exposures faintly on 2018-10-03 in R band. I don’t believe it is an artifact or cosmic ray. If it had been in front of a galaxy I’d say SN but it seems to be on it’s own.
