Expected number of detectable exoplanets binned in the radius-equilibrium temperature plane for the 5.6 μm filter (F560W, top), 10 μm filter (F1000W, middle), and 15 μm filter (F1500W, bottom). The histograms in each subfigure show the projected equilibrium temperature distribution (top) and the projected radius distribution (right) of the detectable exoplanets. The numbers in percent state the percentage of planets, which is also detectable with radial velocity observations assuming a detection threshold of K_∗ ≥ 10 cm s^-1 and a planet density of ρ_p = 5000 kg m^-3. Color shade and figure axes are scaled equally in all three subfigures for better comparison. A negligible percentage of detectable exoplanets (1%) have equilibrium temperatures below 100 K or above 1300 K and thus lie outside the depicted bins.