The 19.48-hour band of KIC 10001893 has no excess centroid power in 14 Kepler release 25 quarters

We test whether image motion can locate the known 19.48-hour brightness signal of KIC 10001893. We fit a fixed 14.261300 microHz harmonic to image centroids in 14 Kepler release 25 quarters. We compare summed quarter scores with 100 nearby frequencies. Ranks range from 0.307 to 0.406 across two baseline lengths, with and without pointing regression. No variant shows excess centroid power. Ideal 30-ppm light signals one pixel from the mean photocenter exceed the control 95th percentile in 73 to 100 of 100 trials. These conditional injections do not include pixel extraction or true amplitude changes. The result does not locate the source, exclude nearby stars or confirm a planet. Independent telescope confirmation is absent. Original code, aggregate fits, source hashes, retrieval steps and a figure are included; external observations remain outside the bundle.

astronomy · KIC 10001893 · Kepler · centroid · planet candidates · contamination · null result