Photometric variability of the protoplanetary nebula LSIV-12°111

We present our photometric observations of an early B supergiant with an infrared excess, the protoplanetary object LSIV-12degrees111, and the previously suspected variable star NSV 24971. We confirm its photometric variability. During two observing seasons (2000-2001), the star exhibited rapid irregular light variations with amplitudes DeltaV similar to 0.(m)3, DeltaB similar to 0.(m)3, and DeltaU similar to 0.(m)4 and a time scale of similar to1(d). There is no correlation between the colors and magnitudes of the star. The variability patterns of LSIV- 12degrees111 and two other hot post-AGB stars, V886 Her and V 1853 Cyg, are shown to be similar. (C) 2002 MAIK ''Nauka/Interperiodica''.