Astronomers have made an exciting discovery at the edge of our solar system. They found a unique space rock named 2020 VN40, which is in sync with Neptune. This tiny object is part of a group called trans-Neptunian objects (TNOs). What’s fascinating is that 2020 VN40 completes one orbit around the sun for every ten orbits Neptune makes. Given that a year on Neptune lasts about 165 Earth years, 2020 VN40 has a year that stretches to a staggering 1,648 Earth years!
The researchers believe that 2020 VN40’s unusual path might be due to Neptune’s gravitational pull trapping it into this rhythm. Team leader Rosemary Pike from the Center for Astrophysics noted, “This discovery is a big step in understanding the outer solar system. It shows how distant areas can still hold interesting objects, offering clues about the solar system’s evolution.”
The orbital motion of 2020 VN40 was uncovered using the Large inclination Distant Objects (LiDO) survey, which operates through powerful telescopes in Hawaii. The goal of LiDO is to find TNOs that orbit far above or below the Earth’s plane around the sun. So far, this area of the solar system has been little explored.
Interestingly, the path of 2020 VN40 differs from other TNOs. Most objects that are influenced by Neptune’s gravity are closest to the sun when Neptune is farthest away. 2020 VN40, however, takes a unique approach: it reaches its closest point to the sun when Neptune is also nearby. This peculiar behavior sets it apart from others in its group.
Ruth Murray-Clay, a scientist at the University of California Santa Cruz, likened this discovery to “finding a hidden rhythm in a song we thought we knew.” It encourages scientists to rethink how distant objects move in our solar system.
Recent research indicates that a growing number of TNOs are being found with unusual orbits, hinting that many more surprises await astronomers. A survey from 2022 revealed that about 20% of newly discovered TNOs show orbital behaviors that challenge old assumptions about how they should move.
This ongoing exploration is thrilling, as scientists believe that other strange objects like 2020 VN40 could provide more insights into our solar system’s history. Thanks to advancements in astronomy technology, the new Vera C. Rubin Observatory will be instrumental in finding these elusive bodies. As Kathryn Volk from the Planetary Science Institute put it, “This is just the beginning. We’re opening a new window into the solar system’s past.”
The findings related to 2020 VN40 were published on July 7 in The Planetary Science Journal. With many mysteries still to solve, the excitement of discovery in our cosmic backyard is just getting started.