One more question about the PCC. I’ve been taking some images of the C/2019 Y4 (ATLAS) comet. It’s a fast moving one, so I need to stack the images aligning to the comet nucleus. The problem is that once aligned, there are no useful stars on the frame to perform the PCC. I can use the standard star alignment to obtain a decent colour balance… but a blurred comet. When we align on the nucleus, I’ve a sharp comet but a wrong colour. Are there any way to transfer the K0, K1, K2 values computed omn the WB command from one image to other?
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