How do Trojan asteroids differ from asteroids in the main belt?

Trojan asteroids and main-belt asteroids differ primarily in their orbital locations and their relationship to gravitational resonances with Jupiter.

• Location: The vast majority of asteroids reside in the main belt, a region situated between the orbits of Mars and Jupiter, typically at mean distances of 2.06 to 3.28 astronomical units (AU) from the Sun. In contrast, Trojan asteroids are located outside the main belt, near the orbit of Jupiter (approximately 5.20 AU).12
• Orbital Dynamics: Main-belt asteroids are subject to mean-motion resonances with Jupiter that often create "gaps" in their distribution, known as Kirkwood gaps, where gravitational forces disperse objects. Conversely, Trojan asteroids are collected and stabilized by a 1:1 resonance with Jupiter. They occupy gravitationally stable regions known as Lagrangian points (specifically L4 and L5), which form equilateral triangles with the Sun and Jupiter.13
• Population: While the main belt contains a vast, distributed population, Trojan asteroids are concentrated into two distinct groups that lead (L4) and trail (L5) Jupiter in its orbit.31