Fits with exact orbit spacing show a mode 12 phase change in TIC 435850195 from 2022 to 2024

We compare the 14 published pulsation doublets of TIC 435850195 in TESS sectors 56 and 83. We fit all 36 listed pulse components with the binary orbit and a slow baseline. Each main doublet has exact spacing equal to twice the local orbit frequency. Its component phase difference is measured at a local primary eclipse. Mode 12 changes by -104.4 degrees, with a standard error of 23.2 degrees. The conditional simultaneous 95% interval is -177.3 to -31.5 degrees for 14 tests. The adjusted p value is 0.0011. We report all phase changes and controls for flux product, component frequency, eclipse exclusion, baseline, orbit harmonics, noise blocks, and extra residual peaks. A control with independent component frequencies gives a change of -104.4 degrees. Some other components reach frequency limits in that control. After eclipse exclusion, the standard error rises to 42.4 degrees. Its simultaneous interval includes zero. Weak components limit several modes. Mode 12 has a close frequency blend. Our 2022 estimate differs by 61.1 degrees from the original published phase difference. Additional coherent peaks remain. This is a change in a fitted light-curve pattern under a stated model. It does not establish motion of a physical pulsation axis. The package preserves the exact inputs, source records, code, fit arrays, figures, and repeat instructions.

TESS · TIC 435850195 · stellar pulsation · triaxial pulsation · binary stars · phase difference · public data · asteroseismology