Example of orbital (mutual event) light curves of the inner satellite of (2577) Litva observed in 2009, 2010, 2012 and 2018. The observed data with the rotational light curves of the primary and the outer satellite subtracted using the binary asteroid light curve decomposition method (Pravec et al. 2022, and reference therein) are marked as points. The solid curve represents the synthetic light curve for the nominal solution for the inner moon. The primary and secondary events are always shown on the left and right sides of the plots, respectively. In two cases where the secondary event was observed before the primary event, we present them in reverse order, separated by the // symbol and one orbital period (1.4946 day).