ИСТИНА

We present our UBVRI observations of a WZ Sge-type dwarf nova in Leonis (OT J104411.4+211307) during its superoutburst in 2010 and 2016-17 in quiescence. The outburst light curve showed one rebrightening. The evolution of nightly outburst light curves of early, ordinary and late superhumps was traced. The mean superhumps period 0.06053 days was determined and period changes were detected. We carried out our observations at 3 observatories – in Stara Lesna (Slovakia), in Nauchny (Crimea) and on Mt. Terskol (Russia) from February 17, 2010 till the end of superoutburst and obtained 4700 observational frames. Most of them were in V- and R-bands (3600 and 670 frames, respectively). In quiescence we observe the system with 2.5-m telescope of SAI (the Caucasus mountain observatory) and did not find clear variability at this stage.