'Mysterious Flying Whirlpool' in the Sky Was Not a UFOA livecam at Hawaii's Subaru Telescope caught sight of a SpaceX second stage on April 17, 2022. It looks like a whirlpool near the left of the frame.
SpaceX has been launching missions at a rapid clip this year. The telescope team called the whirlpool sighting rare, but there could be more of these fun views caught on camera as Falcon 9 launches become ever more routine.
https://www.cnet.com/science/space/mysterious-flying-whirlpool-in-the-sky-was-not-a-ufo/