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Jimmy, when looking at the corner crop you have provided, it looks like you've got a ghosting issue. The same star is present two or three times but in slightly different places. Don't mistake this for noise or coma. This could be caused by tracking or vibration the shutter - make sure you're tiggering this remotely, not touching the camera.
If this is a two or more frame composition, then they simply aren't aligned (registered) correctly. But if its a single frame (one exposure), then I'd look into the mount tracking, vibration, guide errors, etc.
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