Abstract
Photoelectric light curves of BH Vir in the UBVRI bands observed by Arévalo et al. in 1986 were analyzed by using the latest version of the Wilson–Devinney program and to investigate the photometric parameters and spot activity. Satisfactory fits were obtained by assuming a hot spot only on the secondary star. The results show that the temperature of the spotted region relative to the photosphere, $T_{\rm s}/T_{\rm ph}$, is 1.13$\pm$0.027. The active region tends to occur at low latitude (near 81$^{\circ}$). The results also show that the mass ratio obtained from the photoelectric light curves is $q=m_{2}/m_{1} =$ 0.971. It is close to the spectroscopic value of 0.968 obtained by Zhai et al. (1990). The photosphere temperature of the primary is $T_{1}=$ 5969$\pm$11 K. After checking of the activity pattern from 1953 to 1991, the activity cycle is estimated to be about 10 yr.
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