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Further explaination to spiky stars - these were mostly caused by auto focusing. If there were errors in collimation or when focusing started deterioarting due to temperature changes and refocusing was needed, stars began to show spikes. I was using ASIair mini for autmated run. Somehow ASIair autofocus would choose a position with minimal star sizes that might not necessarily be round if there were collimation errors or mirror deformations.
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