Trojan asteroids

Trojan asteroids
The targets of the Lucy mission are Jupiter's 'Trojan' asteroids. These asteroids move in the same orbit as Jupiter around the Sun and form clusters of small bodies at two of the five Lagrange or libration points, where the gravitational forces of the Sun and the planet cancel each other out. They may have a different origin than the asteroids in the main belt between Mars and Jupiter. This image shows the 'Trojans' 60 degrees behind Jupiter around point L5, Jupiter itself and the asteroid cloud 60 degrees in front of Jupiter with the 'Greeks' around point L4.
Credit:

NASA/JPL-Caltech