# New light curve solution of V568 Peg and first determination of its fundamental parameters

## TL;DR

This study provides a detailed light curve analysis of V568 Peg, an overcontact binary star, determining its fundamental parameters for the first time using photometric data and Gaia distance measurements.

## Contribution

First comprehensive light curve solution and fundamental parameter determination for V568 Peg, including mass, radius, and luminosity estimates based on new photometric observations and Gaia data.

## Key findings

- V568 Peg is an overcontact binary of A subtype with a moderate fill-out factor.
- A large cool spot on the primary component was identified and monitored over 4 years.
- Masses, radii, and luminosities of the components were calculated for the first time.

## Abstract

We present V, Rc photometric observations of the short-period W UMa star V568 Peg. They allowed us to improve its period. The light curve solution revealed that V568 Peg is an overcontact binary of A subtype with moderate fill-out factor. Its components are K stars which undergo partial eclipses. The mass ratio was estimated by q-search analysis. We established existing of big cool spot on the primary component with almost the same parameters during the last 4 years. Based on our light curve solution and the GAIA distance we calculated at the first time the masses, radii and luminosities of the components of V568 Peg.