Time capsules from the delivery of our Solar System greater than 4 billion years in the past, the swarms of Trojan asteroids related to Jupiter are thought to be remnants of the primordial materials that shaped the outer planets. The Trojans orbit the Solar in two free teams, with one group main forward of Jupiter in its path, the different trailing behind. Clustered round the two Lagrange points equidistant from the Solar and Jupiter, the Trojans are stabilized by the Solar and its largest planet in a gravitational balancing act. These primitive our bodies maintain very important clues to deciphering the historical past of the photo voltaic system, and even perhaps the origins of natural materials on Earth.
NASA’s Lucy shall be the first house mission to research the Trojans. The mission takes its title from the fossilized human ancestor (known as “Lucy” by her discoverers) whose skeleton offered distinctive perception into humanity’s evolution. Likewise, the Lucy mission will revolutionize our data of planetary origins and the formation of the photo voltaic system.
Lucy is slated to launch in October 2021 and, with boosts from Earth’s gravity, will full a 12-year journey to eight completely different asteroids — a Important Belt asteroid and 7 Trojans, 4 of that are members of “two-for-the-price-of-one” binary programs. Lucy’s complicated path will take it to each clusters of Trojans and provides us our first close-up view of all three main sorts of our bodies in the swarms (so-called C-, P- and D-types).
This diagram illustrates Lucy’s orbital path. The spacecraft’s path (inexperienced) is proven in a body of reference the place Jupiter stays stationary, giving the trajectory its pretzel-like form. After launch in October 2021, Lucy has two shut Earth flybys earlier than encountering its Trojan targets. In the L4 cloud Lucy will fly by (3548) Eurybates (white) and its satellite tv for pc, (15094) Polymele (pink), (11351) Leucus (crimson), and (21900) Orus (crimson) from 2027-2028. After diving previous Earth once more Lucy will go to the L5 cloud and encounter the (617) Patroclus-Menoetius binary (pink) in 2033. As a bonus, in 2025 on the manner to the L4, Lucy flies by a small Important Belt asteroid, (52246) Donaldjohanson (white), named for the discoverer of the Lucy fossil. After flying by the Patroclus-Menoetius binary in 2033, Lucy will proceed biking between the two Trojan clouds each six years.