Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results

Details Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004icar..169..373l&link_type=abstract

Icarus, Volume 169, Issue 2, p. 373-384.

Physics

30

Composition, Surface, Infrared, Observations, Spectroscopy, Meteorites

Scientific paper

Near-Earth objects (NEOs) represent one of the most intriguing populations of Solar System bodies. These objects appear heterogeneous in all aspects of their physical properties, like shapes, sizes, spin rates, compositions etc. Moreover, as these objects represent also a real threat to the Earth, a good knowledge of their properties and composition is the necessary first step to evaluate mitigation techniques and to understand their origin and evolution. In the last few years we have started a long-term spectroscopic investigation in the visible and near-infrared (NIR) region of near-Earth objects. The observations have been performed with the 3.5 m NTT of the European Southern Observatory of La Silla (Chile). The data presented here are a set of 24 spectra, 14 of which are both visible and NIR. We discuss the taxonomic classification of the observed NEOs, resulting in 13 S-type objects, 1 Q-type, 2 K-types, 3 C-types, 5 Xe-types (two of these, (3103) Eger and (4660) Nereus, are already known as E-types). Moreover, we discuss their links with meteorites and the possible influences of space weathering.

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