Hilda asteroids are a group of asteroids that orbit in a 3:2 resonance with Jupiter, meaning they complete two orbits around the Sun for every three orbits of Jupiter. These asteroids are located in the outer asteroid belt, between the orbits of Mars and Jupiter. They are thought to have originated from the primordial asteroid belt and were later captured in their resonance with Jupiter. Hilda asteroids have relatively stable orbits due to their resonance with Jupiter, which helps to protect them from gravitational perturbations that could otherwise destabilize their orbits. Studying Hilda asteroids can provide valuable insights into the formation and evolution of the solar system, as well as the dynamics of asteroid populations in the outer asteroid belt. Several missions have been proposed to study Hilda asteroids, including the proposed Asteroid Touring Nanosat Fleet mission, which aims to explore and characterize multiple Hilda asteroids using a fleet of small spacecraft. Overall, research on Hilda asteroids is ongoing and continues to shed light on the complex dynamics of the outer asteroid belt.