A comprehensive study on the K2-type binary V1393 Tau in four-year observations

We carried out a low resolution spectrum, the first ground-based multi-color light curves (LCs) analysis, and Transiting Exoplanet Survey Satellite (TESS) data analysis for the binary V1393 Tau. We determined its spectral type of K2V and updated an orbital period 0.24738715 days. By the Wilson-Devinney program, we solved ten sets of light curves. From the BVRcIc-band LC2022.11, we obtained a mass ratio q=2.500(3) and a fill-out factor f=11.73(6)%, which implies that V1393 Tau is a W-type shallow-contact binary. We traced the spot migration and evolution through modeling light curves during the past four years. The spot’s size alternately becomes smaller or bigger, and its longitude intervenes between λ=82.39∘ in LCS70 and 102.56∘ in LC2022.10 except for LCS32. •V1393 Tau is a short-period contact binary with the K2V type from the spectrum.•We performed the first multi-color photometry and five sets of light curves.•We traced the spot’s migration between the longitude of 64 degrees and 103 degrees.