Physical and orbital evolution in time of a class B planet from set F1. Panel a, top panel: mass evolution. Middle panel: evolution of pericentric distance (q), semimajor axis (a), and apocentric distance (Q) with light blue, purple, and green traces, respectively. Bottom panel: evolution of eccentricity. Panel b: temporal magnification around the time corresponding to an erosive collision with a Mars-mass projectile. The color code is analogousto panel a. The black vertical line in both panels indicates when the planetary embryo suffered an erosive collision.