The computer models of Wood and Wilson-Devinney have been used to solve the light curve of RT UMi, an eclipsing binary with unknown mass function and a small value of the inclination angle. The system turns out to be a normai semi detached system, showing the inadequacy of the Russell and Merrill method in this limit case. The good agreement of the two solutions obtained enforces the validity of methods based on light curve synthesis, even in the absence of good starting parameters.
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