Subject: AAZ0000u3i
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by rob_t
Weird one- moves at right angles!?? Cant be 4 artifacts surely?
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by rob_t
Correction- its just erratic!
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by artdent42
Yes, it is a camera artifact. The camera is usually shifted in that pattern between pictures and the stars re-aligned for us to view.
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by rob_t
I've seen others where all the stars move in that camera pattern though. This is just one dot moving...........
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by rob_t
Yes, see what you mean now, the black artefacts seem to move in that same pattern.
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by CTidwell3
Exactly. The single dots like this are #hot-pixel artifacts, while the black spots are flat field deflects. Both show this movement pattern.
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