Mira NSVS 2572317 in the UMa heart (BVRI - AAVSOnet, TG&CR - AMIF, g - ASASSNSP).
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Hmmm, regularly irregular, sinus arrhythmia. looks like the star is still “breathing”!
I think this sort of thing is not so unusual, but means that there is more than one pulsational mode in play.
\Brian