USAAAO — 2021 First Round

TESS Object of Interest (TOI) 402.01 has an orbital period of 4.756 ± 0.000023 (days) and was last observed to transit on 2139.1 ± 0.0027008 (in TESS Julian days, i.e. BJD - 2457000). For follow-up observation, we would like to predict the next transit and its maximum possible error – this would be the 23rd transit since the last observation. In TESS Julian days, when will the next transit occur? [Wording updated from the original exam to specify the maximum possible error.]