Context of WASP-122b, marked with a star symbol, with respect to all known planets with T_eq > 1400K and R_p > 0.6 R_J. The equilibrium temperature is plotted on the vertical axis and surface gravity (top panel), and the transmission spectroscopy metrics (bottom panel) are plotted on the horizontal axis. The gray horizontal line in the temperature where we differentiate the HJ and UHJ according to Stangret et al. (2022) at 2150 K. For both figures, the size of the marker indicates the planetary radius and the V -band magnitude of the host star is color- coded.