There are a lot of publications on rare currently noneclipsing triple star SS Lac. The shortest but very informative one was published in Belarusian amateur bulletin: SS Lacertae: The non-eclipsing eclipsing binary
ASAS-SN SP data confirms the absence of eclipses now, however scatter gives weak and uncertain hint on period 14.765d, what is close to real former period 14.41629d. “Coincidence? I don’t think so”.
Of course, I do not insist, but maybe this “scatter period” has relation to real physical process in this very specific system?
Hi Mikhail,
if it was something real, you wouldn’t have datapoints at maximum at the same time there are points at minimum.
If the eclipses would have resumed, you woudn’t see them throughout the JD light curve, they would start at some point, and that would be something gradual.
What you see here is just scatter caused by saturation. The star is close to the ASAS-SN saturation limit.
An orbital period can’t change that much, what seems “close” might be close for a semirregular or a spotted star, not for an eclipsing binary.
Cheers,
Sebastian
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Yes, Sebastian, you are absolutely right: current spectroscopic period is close to former photometric one.
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