One Star Registration (deep-sky)
This is the simplest method to register deep-sky images.
Because only one star is used, images are aligned using the simplest transformation, i.e. 2 shifts on X and Y. No rotation or scaling are performed.
A selection needs to be done in the image to indicate where the star will be searched, so this requires user intervention and cannot be simply automated. The star search throughout the sequence is conducted using the 'PSF for the sequence' function, available from the image contextual menu or from the seqpsf command.
Tip
Shifts at subpixel precision are saved in the sequence file. No new sequence is created. Note however that shifts at pixel precision will be used for stacking.
