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The chemical composition of the asteroids, gleaned by telescopes, matched a set of rare meteorites called EL enstatite chondrites, they reported in 2022.

The Winchcombe meteorite belongs to a rare class of rocks known as carbonaceous chondrites.

Previous studies suggested that Ryugu's sample mineralogy resembled CI chondrites, the most primitive meteorites chemically.

The researchers found that Phaethon's spectrum corresponds exactly to a certain type of meteorite, the so-called CY carbonaceous chondrite.

Rare meteorites called enstatite chondrites have high metal contents and Psyche-like densities, but their parent body is thought to have formed closer to the Sun.