The 2024 TESS phase of WD 0912+536 agrees with the 2020–2022 clock on the best fit cycle count

We test the known brightness clock of the magnetic white dwarf WD 0912+536. We fit the public SPOC 120-second TESS data from sectors 21 and 47. We then measure the phase in sector 74 at the early frequency. The sample has 47,294 retained measurements in three visits from 2020 to January 2024. A model with the fundamental, its second harmonic, and separate linear trends gives an early period of 1.3310534 days. The later fundamental maximum is 2.08 minutes earlier than predicted. We use 999 random sign block simulations for each noise test. The four block lengths are 0.25, 0.5, 1, and 2 days. All four 95 percent percentile intervals include zero phase shift. Their envelope is about -20.3 to +16.6 minutes. Changes to the flux column, signal terms, trend, and bins give timing shifts between -3.82 and -0.43 minutes. The PDC fundamental amplitude ratio is 1.022. The four noise tests find no resolved amplitude change. This is a retrospective phase test of a known signal. It assumes the selected cycle count and noise blocks. It does not establish stability in the gaps or test a planet model. The package contains the original FITS files, hashes, archive inventory, code, all simulations, figures, and instructions for offline reproduction.

WD 0912+536 · TIC 251080865 · G195-19 · TESS · magnetic white dwarf · phase prediction · stellar rotation · public astronomical data · block bootstrap