  Launched on April 2018, NASA's Transiting Exoplanet Survey Satellite (TESS)
has been performing a wide-field survey for exoplanets orbiting stars with a
goal of producing a rich database for follow-on studies. Here we present
estimates of the detected exoplanet orbital periods in the 2-minute cadence
mode during the TESS mission. For a two-transit detection criterion, the
expected mean value of the most frequently detected orbital period is 5.01 days
with the most frequently detected range of 2.12 to 11.82 days in the region
with observation of 27 days. Near the poles where the observational duration is
351 days, the expected mean orbital period is 10.93 days with the most
frequently detected range being from 3.35 to 35.65 days. For one-transit, the
most frequently detected orbital period is 8.17 days in the region with
observation of 27 days and 11.25 days near the poles. For the entire TESS
mission containing several sectors, we estimate that the mean value of orbital
period is 8.47 days for two-transit and 10.09 days for one-transit,
respectively. If TESS yields a planet population substantially different from
what's predicted here, the underlying planet occurrence rates are likely
different between the stellar sample probed by TESS and that by Kepler.
