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Old 19-07-2015, 07:20 PM
gregbradley's Avatar
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gregbradley is offline
Join Date: Feb 2006
Location: Sydney
Posts: 15,712
What mount and scope are you using? Focal length?

What autoguide settings have you set? (exposure length, min/max move)

Even with a reasonable polar alignment a long focal length scope guide star can drift. If your mount has high periodic error then this could drift a lot or if the polar alignment is badly off or the mount poorly balanced it can drift a lot.

Do you get round stars in 10 minute exposures at 1x1 binning?

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