Quote:
Originally Posted by codemonkey
Troy's nailed it I think, but this post sparks a question for me. I've never dithered; would dithering impact your RMS?
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Dithering only temporarily puts a bump in the plot, because it shifts the star by some small, random amount, then the guiding centres on the shifted star within a short time usually (seconds, 10s maybe?). PHD2 labels dithers in the plot so you know a dither from other jumps in the plot (eg from backlash, PE, wind etc).