[HeavyT]

Hi all

I'm very new to astrophotography and extremely new to guiding.

Finally got it working last night, but could only achieve acceptable 60 second exposures.

QHY5L-ii-mono through a ZWO mini guidescope, riding an ED100 riding a CG5. Guiding connection is "on camera".

I know my polar alignment wasn't super because of drift in the image over a couple of hours plus both ra and dec graphs consistently hovered around +1 arc second.

But the real thing seemed to be the intermittent clusters of correction spikes. (Photos attached).

I might think it's a periodic error caused by old gears, but why would the spikes be mirror images of each other? It wasn't all that windy, and I have read that dec might only receive correction for polar alignment errors (which would be consistent, not intermittent peaks?)

PHD2 calibration settings need a look perhaps?

Thanks for reading, and clear skies.