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We combine and calibrate publicly available data for Boyajian's starincluding photometry from ASAS (SN, V, I), Kepler, Gaia, SuperWASP, and citizenscientist observations (AAVSO, HAO and Burke-Gaffney). Precise (mmag)photometry covers the years 2006-2017. We show that the year-long fluxvariations with an amplitude of ~4% can not be explained with cyclicalsymmetric or asymmetric models with periods shorter than ten years. If the dipsare transits, their period must exceed ten years, or their structure mustevolve significantly during each 4-year long cycle.

The year-long flux variations in Boyajian's star are asymmetric or aperiodic