Number of particles in the leading and trailing side of the horseshoe orbits during the nominal model migration and growth of Jupiter. The blue line is the number of particles in the L₄ side of the horseshoe orbit (leading side) versus time and the green line is the number of particles in the L₅ side of the horseshoe orbit (trailing side) versus time. Horseshoe orbit encompass both L₄ and L₄, hence an excess of leading particles means that particles spend more time in the leading part of the orbit. Dashed lines indicate the time frame where Jupiter is growing and migrating.