V 1341 Cygni is an optical counter - part of the X-ray source Cygnus X-2

The radiation of the Population II main-sequence F-type subdwarf is predominating in the bands of the UBV system in the spectrum of V1341 Cygni. This is a star to the evolutionary stage of blue straggler with a mass close to solar. Periodic component of its light with amplitude of 0m.27 B in the quite state is caused partly by ellipsoidal shape of its surface distorted by gravitational influence of X-ray companion. There is a low-luminosity accretion disk in the system, the contribution of which to the total light in the B band varies in the range between 0 and 50 per cent. Some active stages, i.e. outbursts of long duration, can be connected with disk instabilities typical for dwarf novae. Comparing spectral and photometric data, EB-V=0m.22±0m.05 is obtained and determined the distance of 1600 pc with possible limits of 1300 and 2100 pc