Which type of stellar variability has a predictable dimming cycle measured in Hours to Days?
Answer
Eclipsing Binary System.
In systems featuring Eclipsing Binaries, two stars revolve around a common center of mass. If the alignment of their orbital plane relative to Earth is just right, one star will regularly pass directly in front of the other from our viewpoint. This results in a temporary, yet highly predictable and repeating dip in the total observed brightness, with cycles typically ranging from a few hours to several days, based on the orbital period established by the two stellar companions.
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