Extended Data Table 7 Cosmogenic and radiogenic isotopes, elemental concentrations, and exposure ages of SPLV samples

From: Catastrophic disruption of asteroid 2023 CX1 and implications for planetary defence

  1. Cosmogenic and radiogenic isotope concentrations, K, U, Th concentrations, shielding conditions (preatmospheric meteoroid radius and sample depth within the meteoroid), production rates Px, cosmic ray exposure ages Tx, and U/Th-He and K-Ar gas retention ages Tx. T26 ages were determined from the 26Al-21Ne isotope pair method (cf. Methods ‘Gamma spectrometry’). The bulk chemical composition determined for SPLV #1 via ICP-AES/ICP-MS (see Supplementary Table 3) was applied to all samples. An upper radius limit of 50 cm was set from fireball observations.
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