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Looking at the whole image you can see rotation.
When you blow up the trees you can see that the camera has rotated in R.A.
Somehow your camera has self rotated or has been knocked. but due to the brightness of the stars and the solidity of the trees at the end of the movement (or the start) it tells me that the camera rotated for about 10 seconds then sat still for about 5 seconds, or sat still for about 5 seconds then started its rotation and 10 seconds later the image was finished while the camera was still slowly rotating.
I hope that makes sense.
Look at the trees in this crop from your pic:
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