Before revision: In 2021, a numerical simulation study argued that the impactor likely originated in the outer main part of the asteroid belt, while a 2024 study suggested based on Ruthenium isotopes that the asteroid formed in the outer Solar System beyond the orbit of Jupiter.
After revision: found in impact layersIn 2021, a numerical simulation study argued that the impactor likely originated in the outer main part of the asteroid belt, while a 2024 study suggested based on Ruthenium isotopes that the asteroid formed in the outer Solar System beyond the orbit of Jupiter.