New three color light curves of TY Boo were acquired during five nights from February to May 2006 in the BV R bandpass using a 50-cm F/8.4 RitcheyChr′etien telescope(Ba50)at the Baja Astronomical Observatory(Hungary),with a512×512 Apogee AP-7 CCD camera.A photometric solution of these light curves was obtained by means of the Wilson-Devinney code.The results showed that the less massive component is hotter than the more massive one,and the temperature difference between the components is △T～249 K.Long term investigation of the system based on all available data shows two stages of increase and a similar trend for decrease,which appears to be periodic behavior.A set of new light elements yields a new period(P=0.3171506d)and shows a periodic decrease with the rate d P/d E=5.858×10-12d cycle-1,6.742×10-9d yr-1or 0.058 s century-1.The evolutionary status of the system is discussed.
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