Close binary system V502 Cyg in Cyg T2

Photoelectric UBVR observations of the short period close binary system V502 Cyg in the T association Cyg T2 are presented.本文呈现了位于天鹅座T2星协（Cyg T2）中的短周期密近双星系统天鹅座V502的光电UBVR观测数据。