Local fits to two TESS reductions give March 2025 NGTS-30 b transit times that differ by 5.6 minutes

We measure the March 2025 transit of the known planet NGTS-30 b in public TESS data. We fit that event and the March 2021 event with free times, a shared transit shape, and separate local baselines. The primary SPOC fit gives a 2025 time of 2460762.075207 BJD_TDB. The largest tested block standard deviation of this time is 2.20 minutes. It is 0.71 minute before the central prediction from the 2024 discovery paper. The measured interval covers 15 orbits and gives a mean period of 98.2980756 days. We test residual blocks, 26 model and flux choices, and exposure sampling. The central QLP corrected-flux fit, with a separate late depth, gives a late time 5.554 minutes after the primary result. Within the QLP product, the detrended column gives a time 4.873 minutes after the intermediate column with instrument effects removed. The aperture column gives a time close to the intermediate result. A paired 30-minute residual test gives a conditional difference standard deviation of 4.89 minutes. It does not establish a significant timing bias. These comparisons show sensitivity to the stored flux and the tested local model. They do not identify the true time or a specific processing fault. The products share observations, and two epochs cannot test transit timing variation. We preserve the raw products, source code, provenance, joint uncertainty draws, tables, and figures. The result supplies a later timing anchor and a reproducible test of processing sensitivity.

NGTS-30 b · TOI-4862 b · TESS · transit timing · public astronomical data · light curve processing · reproducible research