supported by the Joint Research Found(Nos.U1831109 and U1631108)in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC)and Chinese Academy of Sciences(CAS);the Science Foundation of China University of Petroleum-Beijing at Karamay(Nos.RCYJ 2016B-03-004 and 2016B-03-006);Key Laboratory for the Structure and Evolution ofCelestial Objects,Chinese Academy of Sciences(No.OP201708)。
High-precision CCD photometric observations of the contact binary V680 Per were obtained in2016.Its symmetric multi-color light curves were analyzed by using the Wilson–Devinney(2013)program.These photometric solutio...