TESS fits show a shorter eclipse interval for TIC 127140421 in January 2025 than in January 2019

This study tests eclipse interval changes in six binary candidates from an earlier SCI sample. It uses public TESS pixels and retains all failed fits. For TIC 127140421, symmetric fits give a primary-to-secondary interval of 4845.64 minutes in sector 7 and 4807.93 minutes in sector 88. The change is -37.71 minutes with a conditional cycle standard error of 4.70 minutes. All seven common model parameters are fitted again after each cycle deletion. Nine usable pairs of control fits give changes from -39.22 to -34.96 minutes. The controls change aperture, baseline, shape, and window. Two pairs without sky removal fail at parameter bounds. Sector 108 also gives a shorter interval, but its individual eclipse times have more scatter. Matching the nominal exposure intervals retains the change. The two eclipse depth maps lie near the catalog position. An approximate timing correction is much smaller than the measured change under the stated spacecraft distance assumption. Other apparent changes fail depth or bound checks, or remain unresolved. The package preserves 23 source pixel files, hashes, extracted arrays, code, results, figures, and instructions for computation without network access. These results measure a change in the fitted eclipse interval. They do not identify its physical cause, establish apsidal motion, or discover a planet or binary.

TESS · eclipsing binaries · eclipse timing · TIC 127140421 · public data · reproducible astronomy