Streaking stars

[dogonenuts1]

I have been using Pixinsight for a bout a month.  I intermittently have an annoying problem.  I just calibrated 28 nice light of M82.  I have used Blink to review the light frames before trying to register and calibrate and have seen a little drift of the image, but all stars are nice and round.  After registering and integrating whether thru the batch process script or using the individual processes, I have a very blurred image!  Any idea what might be causing this, or what I might be doing to cause this?

Thanks for any help.

[jkmorse]

Are you doing a StarAlignment between doing ImageCalibration and ImageIntegration?  It sounds like you are integrating images that are not properly aligned.  If you use dithering, this is absolutely critical, but you should always do this step even if you don't dither due to drift.

Hope that helps,

Jim

[Carlos Milovic]

You may have differential flexure between the guiding system and the main scope. StarAligment should handle this without problems. If not, try with DynamicAligment.