120 s TESS data show a wider TOI-216 b transit dip in 2025 than in 2023 after local baseline correction
We tested whether the known transit shape change of TOI-216 b continued after 2023. We used 43 public TESS SPOC light curves with 120 s exposures. Coverage rules retained 51 b and 25 c transits from four observing groups. We fitted each transit center separately and measured the width at half the central depth from locally corrected, combined flux. With 4 minute bins and Gaussian smoothing of standard deviation 8 minutes, the b width increased from 118.0 minutes in 2023 to 138.1 minutes in 2025. The increase was 20.1 minutes, with a 95% whole transit bootstrap interval of 13.6 to 27.2 minutes. The c change was 1.2 minutes, with an interval of -3.0 to 4.6 minutes. Whole sector resampling gave a b interval of 14.1 to 27.5 minutes. Processing changes and removal of single events retained a positive increase. A constant template on the actual timestamps gave a change of 0.02 minute without noise and -2.32 minutes with measured residuals. The evidence supports continued change in the observed b transit shape, consistent with published precession. It does not identify a unique cause or a new planet. The analysis was exploratory, and intervals are conditional on event selection and reduction. The package preserves exact input columns, source hashes and headers, fitted centers, resampling draws, code, figures, and reproduction instructions.
TOI-216 · TESS · transit shape · transit duration variation · orbital precession · public data · reproducible astronomy
References
8- usesdoi:10.17909/t9-nmc8-f686
This TESS collection supplies the 43 public 120 s SPOC source light curves. Exact URIs and hashes are in the package.
- supportsdoi:10.3847/1538-3881/accd66
This study established the earlier transit shape change and precession interpretation. The new flux width comparison extends the observations to 2025 and agrees with the direction of continued change. It does not repeat a full dynamical fit.
- doi:10.1093/mnras/stz1141
This discovery study describes the known resonant pair and its transit sequences.
- doi:10.48550/arXiv.2606.17218
Version 1 studies transit times through TESS Sector 69. It does not test the significance of transit depth or duration changes.
- A shared circular model gives longer TOI-1518 b transits in late 2024 than in 2022 sci:sha256:32f6fa71ed85634abc061dfc9f3ac72c3bf689c70da13da1b5daad4d53f6d6d3
Related SCI work tests transit duration changes with local TESS fits and whole event resampling. This work uses TOI-216 and a direct flux width. No source data or code are reused from the SCI study.
- usesdoi:10.1086/683602
The batman software supplies exposure integrated transit templates for separate transit centers and signal recovery.
- doi:10.1117/1.JATIS.1.1.014003
This paper describes the TESS mission that supplied the observations.
- doi:10.1117/12.2233418
This paper describes the SPOC pipeline that produced the source light curves.
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesA two-planet timing fit with fixed initial orbit planes agrees with the 2023–2025 transit path change of TOI-216 b
We use its frozen TESS columns, event selection, seasonal shapes, source provenance, and adapted center-fit code.
- usesTOI-216 b fits give a lower impact parameter in 2025 than in 2023 with one radius ratio and a fixed stellar brightness law
We reuse its exact event selection, source-column extracts, source headers, and provenance. Its empirical width result is prior evidence. We add joint geometry and speed fits, common-impact comparisons, and depth-model tests.
- Local two-planet forecasts with fixed initial orbit planes do not cover the 2025 TOI-216 times in joint 95% regions
This source supplies the upstream TESS extraction and seasonal shape procedure used by the timing parent.