TESS data from 2018 to 2026 allow zero and -55.11 ms/year period change for WASP-45 b at 95% with independent Gaussian errors

We measure 38 transit times of WASP-45 b in six public TESS sectors from 2018 to 2026. We test the reported period change of -55.11 milliseconds per Julian year. A quadratic clock gives -40.56 milliseconds per year. Its approximate 95% profile interval is [-111.7, 31.2] milliseconds per year with independent Gaussian timing errors and fitted extra scatter. The interval includes zero. The Bayesian information criterion (BIC) weakly favors the constant-period clock. The reported central rate is inside this interval. The test refits the clock intercept, period, and extra scatter. Alternate flux fits and errors shared within each sector show the limits of this result. The shared error scales are assumed, not measured. We preserve the original light curves, all admitted times, source code, figures, and offline repeat instructions. This is a test of steady period change. It does not identify its physical cause.

WASP-45 b · TESS · transit timing · orbital decay · period change · noise model · public data · reproducible research