Five TESS transit times for TOI-1812.03 fit a constant period from 2020 to 2024 with symmetric transit models

We measure five transit center times for the 48.3-day signal at TIC 207425167, listed as TOI-1812.03. We use public 120-second TESS light curves from sectors 22, 25, 56, 79, and 82. These events span 2020 to 2024. A symmetric transit model gives a period of 48.328942 ± 0.000096 days. The largest timing residual is 2.57 minutes. The time errors are 4.02 to 5.20 minutes after checks with residual blocks. The fit agrees with the existing TESS pipeline period of 48.329019087 days. The sector 56 center is 27.93 minutes earlier than the epoch-19 value in Table B of Nabbie et al. (2026), arXiv version 1. Ten checks of the flux baseline, window, flux product, and symmetric transit shape keep that difference between 27.93 and 29.48 minutes. The table also uses a TOI label that differs from its text and orbital table for this signal. The cause of the time difference is unresolved. We provide the two later event times, a five-event timing data set, covariance, original light curves, source hashes, code, and figures. The result applies to these five events and the tested models. It does not validate a planet or exclude timing changes between the events.

TESS · TOI-1812.03 · TIC 207425167 · transit timing · ephemeris · public data audit · reproducible research