Ellipsoidal effect in the symbiotic star YY Her

Abstract

A new estimation of the orbital period of YY Her on the base of our and published observations is presented. Phased light curves in RI bands show evidently ellipsoidal effect connected with the tidal distortion of the giant surface.

2 pages, 1 figure, Conference Binaries - key to comprehention of the Universe, Brno, Czech Republik