My goal is to select several targets for a night and check if the telescope can manage automatically to place them in the slit and acquire spectra. I think it is doable using Adjust Lock Position and Sticky Lock. I have tried it manually and it works, but i do not know how to send numbers, with a script, to the Adjust Lock Position.
The procedure would run roughly this way:
-send the telescope to RA, DEC.
-start guiding
-acquire and save an image with PHD2
-plate solve calculating the center (RA, DEC) of the image
-calculate the offset in pixels (Δx, Δy) from the target to the center of the slit
-add that offset to Adjust Lock Position numbers
-wait a few minutes and recheck with a new plate solve
-recenter if necessary (working manually i hardly never need a recenter, it normally works the first time if the offset is calculated correctly!)
-start acquiring spectra
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request from David C