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We present the results of $WBVR$ observations of the low-mass X-ray binaryV1341 $\textrm{Cyg} = \textrm{Cyg}$ X--2. Our observations include a total of2375 individual measurements in four bands on 478 nights in 1986-1992. We tiedthe comparison and check stars used for the binary to the $WBVR$ catalog usingtheir $JHK$ magnitudes. The uncertainty of this procedure was 3$%$ in the $B$and $V$ bands and 8%-10% for the $W$ and $R$ bands. In quiescence, theamplitude of the periodic component in the binary's $B$ brightness variationsis within $0.265^{m}{-}0.278^{m}$ ($0.290^{m}{-}0.320^{m}$ in $W$); this is dueto the ellipsoidal shape of the optical component, which is distorted withgravitational forces from the X-ray component. Some of the system's activestates (long flares) may be due to instabilities in the accretion disk, andpossibly to instabilities of gas flows and other accretion structures. Thebinary possesses a low-luminosity accretion disk. The light curves reveal noindications of an eclipse near the phases of the upper and lower conjunctionsin quiescence or in active states during the observed intervals. We concludethat the optical star in the close binary V1341 $\textrm{Cyg} = \textrm{Cyg}$X-2 is a red giant rather than a blue straggler. We studied the long-termvariability of the binary during the seven years covered by our observations.The optical observations presented in this study are compared to X-ray datafrom the Ginga observatory for the same time intervals.

Optical Multicolor WBVR-Observations of the X-Ray Star V1341 Cyg = Cyg X-2 in 1986-1992