Light curves of V902 Mon folded on the inferred spin period of 2208 s, with a binning of 200 bins per spin period. Two cycles are plotted for clarity and the eclipses have been excluded. Shown are the folded light curves for four epochs: 2008 Nov 25–2009 Jan 5 (top panel), 2014 Feb 18–2014 Mar 16 (second panel), 2015 Dec 5–2015 Dec 29 (third panel), 2016 Jan 9–2016 Mar 16 (fourth panel), and 2017 Oct 12–2017 Oct 21 (fifth panel). A sinusoidal modulation is visible at all five epochs. Large black and red points indicate the AAVSO V-band and I-band observations for the epoch in question. The Calar Alto data points are indicated with large orange markers in the fourth panel, and the XMM-Newton Optical Monitor data are the blue points in the bottom panel. The spin phase zero point is arbitrary.