Abstract
Photometric observations of four main belt asteroids were obtained on four nights 2021 August 9 to 2021 October 6. The following rotational periods were determined: 1774 Kulikov, 3.831 ± 0.001 h; 7145 Linzexu, 2.905 ± 0.004 h; 11099 Sonodamasaki, 7.247 ± 0.001 h and (16024) 1999 CT101, 2.791 ± 0.001 h.