Complete TESS transits of TOI-216 b have larger mean half-depth widths in 2025 than in 2023

We measure the width at half depth of individual TOI-216 transits. We use 43 public TESS light curves at 120-second cadence. We fit each transit center separately because the system has large known transit timing changes. The main sample has 51 complete transits of planet b and 25 of planet c. For b, the 2023 mean is 113.9 minutes from 10 transits. The 2025 mean is 138.9 minutes from 12 transits. The increase is 25.0 minutes, or 21.9 percent. Its 95 percent sector bootstrap interval is 16.6 to 32.2 minutes. The mean change for c is -0.2 minutes (-2.9 to 2.8). Only four complete c events occur in each period. We test flux products, baseline models, window lengths, local physical transit shapes, fixed-shape injections, and correlated residuals. The result extends the known transit shape record. The point increase ranges from 22.1 to 25.5 minutes across the tested analysis choices. It does not establish a new planet or a unique cause. The intervals depend on sector resampling and do not include all common systematic errors. We provide lossless input columns, source hashes, all event decisions, code, and figures.

TOI-216 · TESS · transit width · transit duration variation · public astronomical data · reproducible photometry