Hi Paul
What I have done in the past using CCDSoft and The Sky 6 Pro, is:
- Capture ccd images with CCDSoft whilst my EM200 is under the control of The Sky on the same computer.
- This automatically records the RA and DEC coordinates of the centre of the ccd frame in the FITS header.
- The next night I slewed to these coordinates and compared the (new) ccd FOV with the previously saved image and then nudged the mount using the manual movement buttons.
- By not removing the ccd camera (SBIG ST7) from the OTA I was able to realign quite easily.
This was with a mount that I set up and tear down each night and it was acceptable for my purposes in chasing the movement of asteroids over a couple of evenings.
With your QHY, it should be possible to establish the centre of the field using The Sky and then for the next evening (session) you could manually GoTo those coordinates and take a test exposure to compare it to the previously captured image.
I have noted that the resolution of the Temma telescope position indicator is less than that of The Sky, so the Temma bull’s eye often appears slightly off the target when zoomed in to small fields. This is a limitation of the Temma protocol from what I have read.
Cheers
Dennis