  New CCD three colors light curves of TY Boo were carried out in five nights
from February to May 2006 in BVR bandpass using a 50-cm F/8.4 Ritchey Chretien
telescope (Ba50) of the Baja Astronomical Observatory (Hungary), and 512*512
Apogee AP-7 CCD camera. A photometric solution of these light curves was
obtained by means of Willson-Devinney code. The results showed that the low
massive component is hotter than the more massive and cool one, and the
temperature difference between the components is Delta T = 249 K. Long term
investigation for the period behavior of the system based on all available data
shows two stages of increase and similar of decrease, which look like as a
periodic behavior. A new light elements yields a new period (p= 0.3171506 day)
and shows a period decrease with the rate dP/dE = 5.858*10^(-12) day/cycle or
6.742*10^(-9) day/year or 0.1 second/century. The evolutionary status of the
system is discussed.
