There are two candidate solutions for this curve. One, 17.72h, and the other, 28.02h.
At this time, the 28.02h is favored. More data is needed on this object.
Period, Amplitude:  17.72 +/-0.02h, 0.20 +/-0.03m
Link to Data for these Curves
Period, Amplitude:  28.02 +/-0.03h, 0.23 +/-0.02m