|
|||||
|
|
Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results |
|
| Authors: | M Lazzarin S Marchi M Di Martino |
| Institution: | a Dipartimento di Astronomia, Vic. dell'Osservatorio 2, 35122 Padova, Italy b Observatoire de Paris, 92195 Meudon Principal cedex, France c INAF—Osservatorio Astronomico di Torino, 10025 Pino Torinese, Italy |
| Abstract: | 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. |
| Keywords: | Asteroids composition Asteroids surface Visible infrared observations Spectroscopy Meteorites |
| 本文献已被 ScienceDirect 等数据库收录！ | |