Ability to retrieve the albedo, inclination and radius of a synchronous rocky exoplanet with a 1.2 m telescope like EChO, whose instrumental noise is simulated with Si:As detectors (rows: a, b) and with the MIRI/JWST c, d) for different stellar masses. The orbital distance is a = 0.02 AU a, c) and a = 0.04 AU b, d). The triangles, squares, and crosses correspond to 3 different stars (M = 0.2, 0.5, and 0.8 M_⊙ respectively). Error bar include 95% of retrieved values. The median of the retrieved values is indicated inside the error bar.