Energy of tidal transfer during one periastron passage. A solar-mass and solar-radius star and a Jovian-mass and Jovian-radius planet are assumed. The energy transfer associated with the planetary fundamental mode ΔE_f is given as a function of the periastron distance by a green broken line, the planetary inertial mode ΔE_in by a blue line, and the energy associated with stellar tides ΔE_star by a black dotted line.