The Eunomia Family: A Visible Spectroscopic Survey

Details The Eunomia Family: A Visible Spectroscopic Survey The Eunomia Family: A Visible Spectroscopic Survey

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icar..142..445l&link_type=abstract

Icarus, Volume 142, Issue Icarus, pp. 445-453.

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15

Scientific paper

We 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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