Circularization timescale vs. eccentricity and planetary mass. This figure shows the tidal circularization timescales of the known transiting exoplanets plotted again eccentricity assuming that the tidal quality factor Q = 10⁶, with circle size indicative of the planetary mass. The circles along the bottom of the plot indicate the different planet mass ranges for each symbol size. CoRoT-14b is shaded gray and is otherwise readily identifiable by its high mass, zero eccentricity, and short circularization timescale. Planetary parameters from the Exoplanet Encyclopedia (http://exoplanet.eu), except for CoRoT-14b.