The Physical Properties of XY Leonis Binary Star System

Abstract

The study of the physical properties of the XY Leonis binary star was conducted at Regional Observatory for the Public Nakhon Ratchasima, National Astronomical Research Institute of Thailand (Public Organization). The 0.5 m reflecting telescope that attached by B and V filters was employed to process for a photometry data collection. The light curves showed that the W UMa eclipsing binary type. The asymmetry of light curves analysis may be due to spot on the star. The result of mass ratio (q) and fill out factor (f) calculations were 2.802 and about 0%, respectively. It was shown that the XY Leonis is a contact binary system.