^1,2A.P. Singh, ³S.S. Pillai, ¹K.K. Marhas, ⁴K.V.N.G. Vikram, ⁴S. Bhattacharya
Icarus (in Press) Link to Article [https://doi.org/10.1016/j.icarus.2026.117045]
¹Physical Research Laboratory, Ahmedabad, Gujarat, India
²Department of Earth Science, Gujarat University, Ahmedabad, Gujarat, India
³University of Kerala, Thiruvananthapuram, Kerala, India
⁴Space Applications Centre, Ahmedabad, Gujarat, India
Copyright Elsevier

This study investigates the mid-infrared spectral correlation between four Carbonaceous Vigarano (CV) chondrites (Allende, Grosnaja, Efremovka and Leoville) and ten asteroids of Xk, L, & Ld types (Bus- Binzel taxonomy). It leverages the mid-infrared region of the electromagnetic spectrum, which is characterised by prominent peaks indicative of crystalline bond vibrations of silicates and ionic oxides. A novel statistical methodology, integrating four distinct similarity assessment techniques (normalised local change method, covariance, Euclidean distance, and cosine similarity), was employed to determine the spectral similarity coefficient (Z) between the CV chondrites and the chosen asteroids. The highest similarity is observed between the asteroids of L type, i.e., Cantillo et al. (2023) (Cantillo et al., 2023) Victoria, (1284) Kassandra, and (1702) Latvia and the CV chondrites studied here, followed by the Xk type (114) Kassandra. The Z value between Ld asteroids (234) Barbara, (269) Justitia and CVs exhibit low similarities. This study establishes a framework for the statistical comparison of mid-infrared spectra of meteorites and asteroids by accounting for compositional variability within CV chondrites, thereby providing a basis for more detailed investigations into the parent-body association of these meteorites.