Identified during a significant survey of a large sloping object (lido) and classified as 2020 VN40, this TransNeptunian entity is the first confirmed object that completes one orbit around the Sun for every ten orbits of Neptune. This discovery, detailed in a paper published in the Journal of Planetary Science, aids researchers in comprehending the behavior of distant objects in the outer solar system and their formation. It lends support to the theory that various remote objects are momentarily “captured” by the gravitational pull of Neptune as they traverse space.
Artist’s impressions of the Transneptunian object. Image credits: NASA/ESA/G. Bacon, stsci.
“This marks a major advancement in our understanding of the outer solar system,” remarked Dr. Rosemary Pike, an astronomer at the Harvard & Smithsonian Center for Astrophysics.
“It demonstrates that even the most remote areas influenced by Neptune can harbor objects, offering fresh insights into the evolution of the solar system.”
“This is merely the beginning,” commented Dr. Katherine Bolk, an astronomer at the Institute of Planetary Science.
“We are opening new windows into the history of the solar system.”
The discovery of 2020 VN40 was facilitated by the Lido Survey, which focused on identifying unusual objects in the outer solar system.
This research utilized the Canadian French Hawaii Telescope for primary observations, with supplemental observations conducted by the Gemini Observatory and Magellan Bird.
The study aimed to locate remnants with orbits extending well above and below the plane of Earth’s orbit around the Sun—an area of the outer solar system that has not been thoroughly examined.
“We’ve witnessed considerable effort and extensive results,” stated Dr. Samantha Lawler, an astronomer at the University of Regina and a member of the Lido team.
The average distance of VN40 in 2020 is approximately 139.5 times that of Earth’s distance from the Sun, following a notably tilted trajectory around the solar system.
The object becomes even more intriguing when considering its relationship with Neptune.
Unlike most objects that, based on their orbital duration ratios, are nearest to the Sun when Neptune is distant, the 2020 VN40 reaches its closest point to the Sun when Neptune is relatively nearby, based on its positional perspective above the solar system.
The inclination of the object’s orbit indicates that it is not positioned closely, as the 2020 VN40 is significantly lower than the general level of the solar system.
All other known resonant TransNeptunian objects have orbits that prevent such alignment when approaching the Sun, even from a flat perspective.
“This new discovery is like uncovering hidden rhythms in familiar songs,” expressed Dr. Ruth Murray Clay, an astronomer at the University of California, Santa Cruz.
“It has the potential to alter our understanding of the movement of distant objects.”
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Rosemary E. Pike et al. 2025. Lido: Discovery of a 10:1 resonator with a new, obsolete state. Planet. SCI. J 6, 156; doi:10.3847/psj/addd22
Source: www.sci.news
