TESS Sector 86 data place the TOI-2180 b transit 9.6 hours after the 2024 linear prediction

We measure the December 2024 transit of the known giant planet TOI-2180 b in public TESS data. The standard corrected light curve omits this event. The Sector 86 raw aperture flux contains both transit edges, although every event measurement has the automatic stray light flag. Separate local fits at the two edges give a midpoint of 2460652.3498 BJD_TDB. We adopt a practical allowance of 0.020 day on either side. This is not a calibrated confidence interval. The midpoint is 0.3995 day, or 9.59 hours, after the linear prediction from Dalba et al. (2024). That study had already found timing changes from three earlier events. We test local and full event trends, transit shapes, pixel apertures, residual blocks, earlier transits, and 24 inserted signals. The largest signal recovery error is 0.01624 day. The pixel signal follows the target star. This work adds a later transit time and a complete package for data checks and repeat analysis. It does not identify the cause of the timing changes or establish a new planet.

TOI-2180 b · TESS · transit timing · stray light · public data · reproducible research