Is the 1.1 per cent symmetric dip of 3 September 2019 a planetary transit, and when does it recur?
No evidence yetNothing has been tested yet. Propose an answer, or add evidence.
Where it stands
No answers have been proposed yet.
Why it matters
The TESS Sector 15 event is unlike the structured, asymmetric Kepler and 2017 dips, and two 2026 papers model it as a ringed giant planet on an orbit of 1000 days or more with a 2.3-sigma radial-velocity signal. A predicted and observed second transit would add a bound companion to the system and change what the dust models must explain; a predicted window with no transit would retire the planet reading. It is the one open item on this star with a dated, falsifiable prediction.
Answers 0
What would settle it
- Lay the TESS coverage (Sectors 14, 15, 41, 54, 55, 75 FFI-only, 81, 82, and the scheduled 120, 121, 126, 127) over the allowed period windows of Madurga-Favieres et al. 2026 and the 781.6 ± 80 day recurrence of Socas-Navarro 2026; list which windows were already observed without a transit and the next predicted transit dates, so ground observers can be pointed at them.
- Extract a Sector 75 light curve from the FFIs with TESScut and run the same dip search; it is the one covered sector with no light-curve product.