The multicolour photometric observations of the neglected eclipsing binary FT Ursae Majoris (FT UMa) were obtained in 2010. The 2003 version of Wilson-Devinney code was used to analyze the light curves in B, V, and R bands simultaneously. Based on the spectroscopic mass ratio q=0.984 published by Pribulla et al., it is found that FT UMa is an evolved contact binary with a contact degree of 15.3%. The low amplitude of light variations, ∼0.15 mag, arises mainly from a moderately low inclination angle of i=62.∘80 and almost identical components in size rather than the light dilution of a third component, which contributes light of only ∼10
@article{arxiv.1106.1694,
title = {A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris},
author = {Jin-Zhao Yuan},
journal= {arXiv preprint arXiv:1106.1694},
year = {2015}
}