TOI-733 HARPS DRS radial velocity curve

It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of Porb=4.884765^+1.9e-5^_-2.4e-5_ days and a radius of Rp=1.992^+0.085^_-0.090_R_{Earth}_.

Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K=2.23+/-0.26m/s, translating into a planet mass of Mp=5.72^+0.70^+_-0.68_M_{Earth}_. These parameters imply that the planet is of moderate density ({rho}_p_=3.98^+0.77^_-0.66_g/cm^3^) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram.