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2h ago

Rare Hillsborough Meteorite Shows Salty Brines and Diverse Amino Acids

Laboratory analyses trace the rock to a salt‑altered region of the inner asteroid belt, offering evidence that primitive asteroids could have delivered prebiotic molecules to early Earth.

Fragment of the Hillsborough meteorite, broken on impact, with fusion crust from passing at high speed through the Earth’s atmosphere. (Credit: SETI Institute)
Close-up of a rock in varying shades of grey
Credit: NASA/SETI

Overview

  • A daytime fireball produced a sonic boom over New York on July 16, 2024, and a fragment crashed through a bedroom ceiling in Hillsborough, New Jersey, where the homeowner immediately recovered and sealed the pieces.
  • Researchers classify the specimen as a very rare CM1/2 carbonaceous chondrite, only the second witnessed fall of this intermediate subtype, with unusually pristine condition because of the rapid, careful recovery.
  • Laboratory work found salt‑rich inclusions and mineral signs of concentrated brines plus a rich suite of soluble organic compounds and dozens of amino acids, many uncommon on Earth.
  • Trajectory reconstruction using public camera footage and Doppler radar links the object to the inner (low) asteroid belt, consistent with an Erigone‑family or similar inner‑belt source.
  • Fragments are being curated at the American Museum of Natural History while scientists continue mineral identification and comparative studies to test whether the organics formed in brine chemistry or during impact processes and to compare Hillsborough with returned asteroid samples.