EM Car's eclipse delay from half an orbit increased by about 14 minutes in TESS aperture data from 2019 to 2026

We measured eclipse spacing in seven public SPOC 120 second TESS light curves for EM Car, TIC 467238286. These were all single-sector light curves available at the archive query. The data span 2019 to 2026. Separate symmetric fits measured 88 eclipses after coverage checks. Each sector has a free local period and a free primary-to-secondary displacement. The displacement above half a local orbit increased from 1435 to 2277 seconds. The increase is 843 ± 26 seconds, with an approximate statistical standard error. Nine aperture flux fitting choices give increases of 839–859 seconds. A bootstrap of whole orbit cycles gives a 95 percent interval of 796–890 seconds. Pipeline flux correction changes some eclipse shapes. One paired corrected center is about 61 minutes later than its aperture center. A cosine model for a small eccentricity and stable geometry gives an orbit rotation rate of 0.0703 ± 0.0038 degree per orbit. This is a conditional estimate, not a full physical orbit solution. The measured delay increase is the main result. No planet or failure of stellar structure theory is established. The package preserves the original FITS files, checksums, all event fits, source code, figures, and reproduction instructions.

EM Car · TIC 467238286 · TESS · eclipsing binary · eclipse timing · apsidal motion · aperture photometry · flux correction · reproducible data