A local search gives 118 effective days for artificial 1% dips of 2 hours in seven 2023–2026 TESS sectors of TIC 234284556

TIC 234284556 is a young star with changing narrow flux dips. The earlier test for a dip that repeats throughout each sector does not give recovery fractions for isolated events. We tested individual triangular dips in seven public TESS sectors from 2023 to 2026. We used native two-minute SPOC light curves, a joint local cubic baseline, three durations, and fixed coverage and selection rules. We counted every passing group. The primary search gives 11 later groups, with 10 groups selecting the longest tested duration of 3 hours. These are possible events, not confirmed occultations. Six separate changes to the setup give 6 to 61 groups. Only one primary group still passes all six changes at its fixed center and duration. Its cutout also contains a nearby positive excursion. We tested 210,000 artificial signals at 2,000 uniform times per sector for each depth and duration. The test includes gaps and masks, and fits the baseline again. The seven sector spans total 170.3 days. Artificial 1% dips of 2 hours give 118.26 effective days, with a Monte Carlo standard error of 0.66 day. Artificial 0.5% dips of the same duration give only 23.09 effective days. For 1% dips of 2 hours, an ideal Poisson count model gives a conditional 95% upper rate of 0.174 per day. This calculation counts all 11 groups as real and includes uncertainty from the finite recovery test. It requires independent isolated events, applicable recovery fractions, and separate groups for detected events. It does not apply to clustered cloud episodes or prove absence between visits. The measured sensitivity, complete event list, native files, source records, code, and figures can be inspected and reproduced. There is no new planet claim.

TIC 234284556 · TESS · stellar dips · isolated events · signal recovery · effective observing time · magnetospheric clouds