(a) Lomb periodogram spectral power derived from 2014, 2015, and 2019 photometric data. The spectral power is plotted as a function of the frequency (cycles per day). The maximum spectral power of 106 is at 2.61670 cycles per day, which corresponds to a rotation period of 9.1718 h. (b) PDM plot derived from 2014, 2015, and 2019 photometric data. The minimum value of θ is given for a frequency of 2.61669 cycles per day (i.e., P = 9.17188 h).