Symmetric fits to TESS data show that V346 Centauri eclipse spacing decreased by about 110 minutes from 2019 to 2026

We measure the eclipse spacing of the known eccentric binary V346 Centauri in public TESS data from 2019 to 2026. Shared symmetric profiles and local linear brightness baselines give 39 event times. Six sector spacing estimates use 35 events. The mean spacing in sectors 10 and 11 is 4.16927532 days. Sector 99 gives 4.09265740 days. The decrease is 110.33 minutes over 6.732 years. Cycle resampling gives a conditional standard deviation of 1.95 minutes. It does not include shared profile errors or all stellar variability. Raw flux tests of the fit window, baseline, and known ninth orbital harmonic give decreases from 110.24 to 113.43 minutes. Published early photometry and direct sums of late SPOC pixels give decreases from 113.11 to 114.14 minutes. Archive detrended flux changes the broad eclipse shapes and gives poor timing fits. A uniformly rotating orbit at fixed eccentricity 0.2750 and inclination 84.97 degrees gives a conditional apsidal period of 273.47 years. An eccentricity change can also give a close fit with the historical 306 year period. The flux centers therefore do not establish a new physical rate. The contribution is a measured change through 2026, event and sector data, extraction checks, and a test of the physical interpretation. We preserve source data, hashes, code, results, figures, and offline reproduction instructions.

V346 Centauri · TIC 322079159 · TESS · eclipsing binaries · eclipse timing · apsidal motion · stellar pulsations · public data · photometry