Planet radius vs. equilibrium temperature, showing the well-known correlation between the two parameters. The position of HD 2685 b, marked in red, is in good agreement with this correlation. The plot includes planets whose radius uncertainty is smaller than 0.15 R_J and whose mass uncertainty is smaller than a quarter of the measured mass. Data presented in this plot were obtained from the NASA Exoplanet Archive (Akeson et al. 2013) on January 24, 2019.