You know I wish I had an image stack I processed when the guide cam was off from the main scope to illustrate how the frames skewed over the course of the night. But it? is lost somewhere in processing sessions of days gone by :). If someone has a night to kill sometime, they could try to exaggerate this distance, say to 2 or 3 degrees from center to center, then watch how the edges migrate hour by hour. The final stack will be misaligned to where only a central region might have enough good overlapping data. Perhaps when there is a full moon with no good targets to image I could run this as an example. But there's probably someone out there who knows the math and can illustrate what will happen exactly.?
