Photometric and period investigation of the late F-type overcontact binary II UMa

X. Zhou, S. -B. Qian, J. Zhang +2

II UMa is a late F-type (F5) contact binary with a close-in tertiary and a distant visual companion. According to the four-color ($B$ $V$ $R_c$ $I_c$) light curves' solutions of II…