Possible rotational periods of Huya discussed in this work. Top panel: Rotational light curve (relative magnitude vs. rotational phase) of Huya obtained from the data described in Sect. 4. The data have been folded with a rotational period of 6.725 h. The zero rotational phase in the plot is fixed close to the moment of the occultation (March 18, 2019 00:54:00 UTC). Bottom panel: Lomb periodogram showing the rotational period P = 6.725 h, which corresponds to the peak with the highest spectral power. The two other aliases at high spectral power correspond to other possible rotational periods of Huya: P ~ 5.2 h and P ~ 4.3 h.