In 2001, the first Neptune trojan was discovered, 2001 QR322, near Neptune's L4 region, and with it the fifth known populated stable reservoir of small bodies in the Solar System.
En 2001 descubriuse 2001 QR322, preto da rexión L4 de Neptuno, e con el a quinta área de poboación estable de corpos menores do Sistema Solar.