Celestron Origin Drift over 3 hours
Thisis a video of all the FIT subframes over a 3 hour collection with the Celestron Origin of IC 433 (the Jelly Fish nebula) showing the drift (vertically here). Others report this as well. The Star Sense Auto Guider (SSAG) is supposed to keep it from drifting. I have one on order and will find out next month. You can also see a horizontal periodic drift back and forth (I think the periodic error). That almost acts like primative dithering. It is also reported that having good darks is very important when using the SSAG to help keep the noise to a minimum - what people call walking noise. The data collection was on a VERY cold night (below freezing) and it was so cold that I was having wifi problems but that did not prevent the scope from saving all the FIT sub-frames. To stop the collection, I had to physically turn the scope off with the power button since I could not get the wifi to re-coonect. I don't know if the cold contributd to the drift. It might have contributed to the stored darks not matching the temperature that the data was collected.
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