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Artificial satellites are a bit of a hazard when imaging the sky. This one went right through the target, making the image useless.
@askans it adds light to the target which means any photometry on the target will now also include the light from the satellite.
@evilscientistca which means you get false values?
@askans It will add brightness making the object seem brighter than it is. It would provide an incorrect value yes.
@evilscientistca why is it useless now?