We present light curve solutions of the W UMa-type eclipsing binary OGLE-GD-ECL-04451 , observed by both the Optical Gravitational Lensing Ex-periment ( OGLE ) program in 2006 and the Antarctica Survey Telescope ( AST3-1 ) in 2012 at Dome A .
We analyzed this binary system with the Wilson-Devinney ( W-D ) method 2013 version and derived the mass ratio q = 2.91 \pm 0.07 , the inclination i = 76.86 ^ { \circ } \pm 0.23 ^ { \circ } , and the light variattion amplitud was 0 ^ { m } .51 based on the OGLE data .
From the AST3-1 ’ s data , we find that the amplitude dropped to 0 ^ { m } .44 ( 2012 ) and the difference of magnitudes of the two light maxima is 0 ^ { m } .03 .
A hot spot was then added on the surface of the secondary to demonstrate the amplitude change and O ’ Conell effect of the binary system .