We analyzed period changes of the high-amplitude Delta Scuti variable star CSS_J102714.3+205943 for about 20 years, utilizing data from the automated sky surveys along with our own observations. With the help of the O-C diagram, we found that the period decreased noticeably between JD2454800 and JD2457300. A possible cause of the change could be intrinsic processes in the star. However, the observed behavior of the O-C diagram can also be explained by the light-time effect if the star is a component of a binary system. Times of maxima for the star, derived from the surveys and our observations, are listed.
@article{arxiv.2503.23521,
title = {The HADS Star CSS_J102714.3+205943: a Component of a Binary System with an Elliptic Orbit?},
author = {Maksym Yu. Pyatnytskyy and Ivan L. Andronov},
journal= {arXiv preprint arXiv:2503.23521},
year = {2025}
}