DP Leonis optical eclipse centers from symmetric TESS fits occur 72–79 seconds after the fixed 2011 curve in 2020–2022

We test the fixed central timing curve of a claimed planet around the magnetic eclipsing binary DP Leonis. We fit four public 120-second TESS light curves from 2020 to 2022. Each sector uses a symmetric trapezoid, exact exposure averaging, daily flux offsets, and a quadratic background. The optical centers occur 72.2, 73.2, 78.0, and 79.2 seconds after the fixed central 2011 curve. Day bootstrap errors are 3.3, 4.6, 4.7, and 3.3 seconds, respectively. All 68 alternate fits change the centers by less than 5.8 seconds. Synthetic signals at the predicted times have absolute mean recovery errors below 0.53 seconds. Pixel fits place the eclipse signal at DP Leo. Historical residuals set the curve convention: 55 consistent rows agree within 0.106 seconds. One other row is internally inconsistent in the examined arXiv version. These measurements describe optical template centers. TESS does not separate the white dwarf, spot, and stream. The old orbit also has correlated parameter errors without an available joint covariance in the examined source. Thus, this comparison does not exclude all planet solutions or identify a new planet. The package supplies data, provenance, source code, results, figures, and instructions for offline reproduction.

DP Leonis · DP Leo · TIC 903484062 · TESS · eclipse timing · magnetic cataclysmic variables · circumbinary planets · light travel time · public astronomical data · reproducible photometry