Spectroscopic Survey of the Hungaria and Phocaea Dynamical Groups

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Scientific paper

We observed 29 Hungaria and 31 Phocaea asteroids at the European Southern Observatory (Chile) in the wavelength range 4900-9200Å . The Phocaea and the Hungaria are both high-inclination groups, located at the inner edge of the main belt near the ν5, ν6, and ν16 secular resonances. We confirm that the Hungaria group is composed mainly of E-type asteroids but with a relatively large number of S-types. The Phocaea group, on the other hand, is composed mainly of S-type asteroids. We discuss the possible implications of the observed composition distribution on the origin and evolution of these high-inclination groups.

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