<ul><li>On May 21, 2025, a new minor planet named 2017 OF201 was added to the list by the International Astronomical Union's Minor Planet Center.</li><li>2017 OF201 is one of the largest solar system objects discovered in the past decade with a diameter estimated between 290 and 510 miles.</li><li>It orbits the sun at a distance ranging from 45 to 838 astronomical units and is classified as a trans-Neptunian object, possibly an extreme one due to its distance.</li><li>Despite its size, 2017 OF201 is not a candidate for Planet 9, as it does not meet the mass requirements to explain the gravitational clustering in the distant solar system.</li></ul>

New minor planet found in the distant solar system

Discover more