Two K2 reductions do not show a stable adjacent-orbit depth correlation for K2-22 in Campaign 1

We test whether the dust-transit depth of K2-22 remains similar on adjacent orbits. We use K2 Campaign 1 and two reductions of the same 3274 good exposures. A fixed box model includes exposure integration and a local linear baseline. Coverage rules retain 102 orbits and 51 adjacent pairs in each reduction. The adjacent-orbit correlation is 0.140 for K2SFF and 0.022 for EVEREST. Conditional 95 percent block intervals are -0.146 to 0.341 and -0.331 to 0.235. Permutations within ten-orbit bins give one-sided p values of 0.353 and 0.489. Wider and quadratic baselines also give intervals that include zero. A fixed triangular profile gives sampling-dependent box depths. These results do not establish dust memory or exclude a physical dust lifetime. A ground-data audit gives no accepted adjacent pair from the same facility and filter. There is no independent confirmation. We report no new planet or source. Code, source hashes, aggregate results and figures support reproduction from external data.

K2-22 · dust transits · temporal correlation · null result · sampling · K2