Achondrites in meteor data: Spectra, dynamics, and physical properties of candidate aubrite and eucrite impactors

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Table 2

Elemental mass fractions of selected species in the meteor plasma, expressed relative to Mg and Fe, derived from the radiative transfer model for ACH1 (aubrite candidate), ACH2 (eucrite candidate), and a representative ordinary chondrite.

Element	Relative to Mg			Relative to Fe
Element	M20241012_113432 (ACH2, eucrite)	M20231120_114953 (ACH1, aubrite)	M20240807_093858 (ordinary chondrite)	M20241012_113432 (ACH2, eucrite)	M20231120_114953 (ACH1, aubrite)	M20240807_093858 (ordinary chondrite)
Si	19.83 ± 6.23	0.34 ± 0.05	1.35 ± 0.37	9.37 ± 2.09	39.36 ± 5.01	1.32 ± 0.34
Mg	1.00 ± 0.00	1.00 ± 0.00	1.00 ± 0.00	0.47 ± 0.07	117.2 ± 9.90	0.98 ± 0.12
Fe	2.12 ± 0.26	0.01 ± 0.0003	1.02 ± 0.06	1.00 ± 0.00	1.00 ± 0.00	1.00 ± 0.00
Ca	0.72 ± 0.27	0.001 ± 0.0005	0.004 ± 0.001	0.34 ± 0.15	0.08 ± 0.06	0.004 ± 0.001
Al	0.59 ± 0.27	0.0002 ± 0.00015	0.002 ± 0.001	0.28 ± 0.14	0.02 ± 0.017	0.002 ± 0.001
Ti	0.014 ± 0.004	0.00003 ± 0.00001	0.002 ± 0.0002	0.007 ± 0.002	0.003 ± 0.002	0.002 ± 0.0003
Cr	0.024 ± 0.006	0.0004 ± 0.0001	0.005 ± 0.001	0.011 ± 0.004	0.052 ± 0.010	0.005 ± 0.001
Mn	0.068 ± 0.005	0.0008 ± 0.0003	0.008 ± 0.001	0.032 ± 0.005	0.097 ± 0.033	0.008 ± 0.001
Na	0.033 ± 0.011	0.0009 ± 0.0007	0.079 ± 0.038	0.016 ± 0.006	0.104 ± 0.089	0.078 ± 0.037
K	0.002 ± 0.0007	4 × 10⁻⁵ ± 3 × 10⁻⁵	–	0.001 ± 0.0004	0.005 ± 0.004	–
Li	2 × 10⁻⁴ ± 8 × 10⁻⁵	3 × 10⁻⁷ ± 2 × 10⁻⁷	–	1 × 10⁻⁴ ± 4 × 10⁻⁵	4 × 10⁻⁵ ± 3 × 10⁻⁵	–

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