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Looking at your specs assuming you guide with a Q-guider (QHY5) your image scale is approx. 2.7arcsec / pixel so your guiding is in the vicinity of +/- 2.6 arcsec. Not bad at all on an HEQ5. Your RMS is very good, your OSC a bit low though. 0.3-0.4 is more the norm?
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