The Eunomia Family: A Visible Spectroscopic Survey

✍ Scribed by Daniela Lazzaro; Thaı́s Mothé-Diniz; Jorge M. Carvano; Cláudia A. Angeli; Alberto S. Betzler; Marcos Florczak; Alberto Cellino; Mario Di Martino; Alain Doressoundiram; Maria A. Barucci; Elisabetta Dotto; Philippe Bendjoya

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 611 KB
• Volume: 142
• Category: Article
• ISSN: 0019-1035
• DOI: 10.1006/icar.1999.6213

✦ Synopsis

We observed 44 Eunomia family members at ESO (European Southern Observatory) and at CASLEO (Complejo Astron ómico 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.