Optical lightcurves of HD 251108. Error bars are omitted for clarity. Top: DASCH lightcurve. Middle: ASAS-SN lightcurve. The flare on 2022 November 7 is easily visible and is the brightest flare observed; a second flares is seen on 2020 September 13. Bottom: ASAS-SN and multiband AAVSO lightcurve over just a few of the short periods. The AAVSO data are taken from different observers. Inconsistent calibration and different instruments lead to systematic offsets within one band (e.g., the R band in 2022 November) between different observers, but the overall variability pattern is consistent. The blue curve shows a model of two sinusoids fitted to the ASAS-SN data.

(An interactive version of this figure is available in the online article).

An interactive version of this figure is available.

An interactive version of this figure is available in the online journal.