Dear SGP developer,
I got trailed stars last night after I upgraded to PHD2 release version 2.6.2. This was not happened before, and I am not sure if it is related to the spiral dither option just for RA I chose, having an integration issue with SGP.
It looks to me, when I saw the guiding curve onsite, I saw a jump in DEC, PHD2 tried to reduce the DEC drift and may be there was also a huge correction in RA which is not seen in the guide curve, but result in a long trail of stars.
It did not happen in every frame.
Could the exposure happen when the dithering is still running? I just want to ensure there is nothing wrong in SGP.
I attach the logs of that portion (00:57-01:01) of the frame for investigation: Logs and FITS
I also reported the issue to PHD2.