Star shape/ eccentricity warning?

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timh
Posts: 515
Joined: Mon Aug 26, 2019 5:50 pm

Star shape/ eccentricity warning?

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Post by timh »

Hi Robin

SC already calculates FWHM on the fly during livestacking. I guess - and I think that you have mentioned? - that Eccentricity is inherent to the same calculation if FWHM is averaged across orthogonal directions

It could also be useful to display that information - if only just as a warning alert whenever star shapes look odd. (say Eccen > 0.65?). More ideally one could filter frames out on that basis.

Obviously there are lots of possible causes -- poor guiding, tube currents, cable snags or as in my case recently -tilt- camera not fully square to optic axis.

Would be generally useful I think though because an early warning could save hours of wasted capture

Tim
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