The frequency 104 mu Hz in the orbital motion of close binary stars

According to General Relativity, a stellar binary generates gravitational waves at a primary frequency twice the orbital one; these waves however have not yet been detected. If the Universe contains gravitational radiation at discrete frequency(ies)- particularly with the period of 160 minutes discovered in the 70-th in the Sun, corresponding resonances might be found in the distribution of orbital frequencies of binaries. With this in mind, we analyse all available data on orbital frequencies of close binaries of the Galaxy. In the frequency range 5 to 160 mu Hz, we find one significant frequency v(0) approximate to 104.2 mu Hz - at the 4 sigma confidence level -which modulates the distribution of about 5000 binaries with periods P < 5.5 d. The corresponding ''resonant'' period, 160.0 +/- 0.5 min, coincides with that of solar pulsation P-0 = 160.0 +/- 0.5 min. The question on its origin and also the hypothesis of a cosmological nature of the P-0 oscillation are briefly discussed.