The Eunomia Family: A Visible Spectroscopic Survey
1999; Elsevier BV; Volume: 142; Issue: 2 Linguagem: Inglês
10.1006/icar.1999.6213
ISSN1090-2643
Autores Tópico(s)Geological and Geochemical Analysis
ResumoWe observed 44 Eunomia family members at ESO (European Southern Observatory) and at CASLEO (Complejo Astronómico El Leoncito) in the wavelength range of 4900–9200 Å. We found 41 objects with the same characteristics: a maximum around λ=7500 Å, and a reflectivity gradient spanning a continuous but limited range. Only 3 objects display featureless spectra similar to C-type asteroids, and these should be considered as interlopers. The spectra of the 41 objects show a similarity which is consistent with the dynamical hypothesis of a common origin. On the other hand, the spread of distribution of surface composition also indicates that the Eunomia family was possibly formed from the fragmentation of a partially differentiated S-type parent body.
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