Multi-color light curves and orbital period research of eclipsing binary V1073 Cyg

New multi-color BV RcIc photometric observations are presented for the W UMa type eclipsing binary V1073 Cyg. Themulti-color light curve analysis with the Wilson-Devinney procedure yielded the absolute parameters of this system, showing that V1073 Cyg is a shallow contact binary system with a fill-out factor f = 0.124 (+/- 0.011). We collected all available times of light minima spanning 119 yr, including CCD data to construct the O-C curve, and performed detailed O-C analysis. The O-C diagram shows that the period change is complex. A long-term continuous decrease and a cyclic variation exist. The period is decreasing at a rate of (P)over dot = -1.04 (+/- 0.18) x 10(-10) d cycle(-1) and, with the period decrease, V1073 Cyg will evolve to the deep contact stage. The cyclic variation with a period of P-3 = 82.7 (+/- 3.6) yr and an amplitude of A = 0.028 (+/- 0.002) d may be explained by magnetic activity of one or both components or the light travel time effect caused by a distant third companion with M-3 (i' = 90 degrees) = 0.511 M-circle dot.