Six event times for TOI-7481.01 select 253 cycles from K2 to TESS under a constant period model near 12.4 days

We test whether one constant period connects four K2 events from 2016 and two TESS events from 2025 for the known candidate TOI-7481.01, also called EPIC 227560005 and TIC 431016234. We fit public flux data with an exposure-averaged symmetric transit profile and local baselines. We estimate time errors with local covariance and 300 block bootstrap trials. For the assigned cycle order within each mission, a scan from 240 to 266 cycles selects 253 cycles between the first K2 and first TESS event. The conditional period is 12.4086657 days, with a formal error of 0.0000194 days. The fit has chi-square 16.15 for four degrees of freedom. The two TESS events are 52.1 plus or minus 13.7 minutes closer together than this period predicts. A separate TESS shape reduces the mismatch. Omitting one TESS event changes the period more than the aperture and baseline checks. An earlier thesis already reported a K2 period near 12.410 days. The new result is the timing connection between missions, its cycle count test, and its limits. We supply a conditional future schedule, original FITS data, source records, fitted samples, bootstrap trials, figures, and code. This study does not establish a planet, identify the source star, or establish physical changes in event time.

TOI-7481.01 · EPIC 227560005 · TIC 431016234 · K2 · TESS · transit timing · cycle count · public astronomical data · reproducible research