Abstract

We present a study of 107 Cybele asteroids based on the archival database Asteroid Catalog Using AKARI (AcuA) taken by the Infrared Astronomical Satellite. The database provides diameters D > 10 km, geometric albedos, and taxonomic information (75%) of the Cybeles. We find taxonomic diversity (mainly C-, D-, and P-type) in the population of 78 small Cybeles with diameters 10 km 80 km are mostly classified as C- or P-types (90%), with a power-law index of 2.39 ± 0.18. The total mass of Cybele asteroids is estimated to be ~10–5 M Earth. We also discuss the origin and formation process of the Cybele asteroid family.

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