TESS transit times and updated ephemerides for HD 1397 b, WASP-161 b and WASP-193 b (2018–2026)

Mid-transit times of HD 1397 b (TIC 394137592), WASP-161 b (TIC 50712784) and WASP-193 b (TIC 49043968) measured from TESS 2-min light curves taken between 2018 and 2026, and the linear ephemerides fitted to them. The new ephemerides predict mid-transit times with 1σ uncertainties under 1 min in 2027 and under 2 min in 2030. The record also gives the offsets of the 2025–2026 transits from published ephemerides. For HD 1397 b, the published predictions for 2025–2026 have 1σ uncertainties of 1.4 to 5.7 h, and the observed transits fall between 3.5 min and 6.3 h from them. Files: transit times, ephemerides, the comparison table, a figure, and the code with commands to reproduce every number from the MAST light curves (README.md). TESS data: MAST, doi:10.17909/t9-nmc8-f686.