TESS data exclude two period intervals near 2800 days for stable repeats with at least 50% light loss over 0.3 day at EPIC 204376071

EPIC 204376071 had a single deep occultation in 2017. We test which fixed repeat periods conflict with public bright exposures from K2, ZTF DR24, and TESS Sector 91. Each repeat must keep target flux at or below half of normal for a continuous 0.3-day core. The reference time can vary by 0.02 day in either direction. Each rejected period has an exposure that lies fully inside the core for every allowed reference time. TESS data from 2025 exclude first-repeat periods of 2773.696343–2780.978975 and 2787.023533–2798.065893 days. They also exclude the corresponding second-repeat intervals near 1400 days. These four intervals total 27.487488 days. In the secondary range of 1200–3000 days, TESS adds 25.275533 days of exclusion beyond K2 plus ZTF. In the primary range of 70–1200 days, all data exclude 30.4519% of interval length, compared with 20.8114% for K2 alone. These fractions are map measures, not orbit probabilities. The ZTF result assumes that at least half of its baseline light comes from the target. The TESS result uses the saved pipeline crowding correction. The limits require stable depth and timing. They do not establish a planet or reject changing dust. The package contains unchanged source data, exact interval maps, exposure certificates, code, provenance, figures, and offline reproduction instructions.

EPIC 204376071 · TIC 9855014 · occultation · circumstellar dust · TESS Sector 91 · K2 · ZTF DR24 · period limits · reproducible astronomy