Comptes Rendus
no. 3
The Near Earth Objects: possible impactors of the Earth/Les astéroïdes geocroiseurs: impacteurs potentiels de la Terre
Surface compositions of NEOs

Présenté par : Pierre Encrenaz

Elisabetta Dotto1  ; M. Antonietta Barucci2  ; Richard P. Binzel3  ; Marco Delbó4
1 INAF-Osservatorio Astronomico di Roma, Via di Frascati, 33, 00040 Monte Porzio Catone, Italy
2 LESIA-Observatoire de Paris, 5, place J. Janssen, 92195 Meudon principal cedex, France
3 MIT-EAPS, 77, Massachusetts Avenue, Cambridge, MA 02139, USA
4 INAF-Osservatorio Astronomico di Torino, Via Osservatorio, 20, 10025 Pino Torinese, Italy
Comptes Rendus. Physique, Volume 6 (2005) no. 3, pp. 303-312.

La caractérisation physique de la surface des astéroïdes proches de la Terre (Near Earth Objets, NEOs) est cruciale pour analyser les relations entre la population des NEOs et les autres populations de petits corps du Système Solaire (astéroïdes de la ceinture principale, comètes et météorites) et pour étudier l'origine des NEOs et leur évolution. La spectroscopie de reflectance nous donne un excellent outil pour déterminer plusieurs aspects de la composition de la surface des objets sans atmosphère. En particulier la photométrie et la spectroscopie dans un grand intervalle de longueurs d'onde (du visible a l'infrarouge) nous permettent de caractériser les matériaux présents sur la surface des NEOs et de classifier ces objets, en fonction de l'albédo et des caractéristiques du spectre observé.

The physical characterization of the surfaces of Near Earth Objects (NEOs) is crucial to analyse the relationships among NEOs and the other populations of minor bodies of the Solar System (main-belt asteroids, comets and meteorites) and to investigate NEO origin and evolution. Reflectance spectroscopy provides a powerful tool for determining several aspects of the surface composition of atmosphereless bodies. In particular, photometry and spectroscopy in a large wavelength interval (from visible to far-infrared) allow us to characterize the materials present on the surfaces of NEOs and to classify them, depending on the albedo values and the observed spectral behaviour.

Publié le :
DOI : 10.1016/j.crhy.2004.12.015
Keywords: Near Earth objects, Reflectance spectroscopy, Albedo
Mots clés : Astéroïdes proches de la Terre, Spectroscopie de reflectance, Albédo
Elisabetta Dotto 1 ; M. Antonietta Barucci 2 ; Richard P. Binzel 3 ; Marco Delbó 4

1 INAF-Osservatorio Astronomico di Roma, Via di Frascati, 33, 00040 Monte Porzio Catone, Italy
2 LESIA-Observatoire de Paris, 5, place J. Janssen, 92195 Meudon principal cedex, France
3 MIT-EAPS, 77, Massachusetts Avenue, Cambridge, MA 02139, USA
4 INAF-Osservatorio Astronomico di Torino, Via Osservatorio, 20, 10025 Pino Torinese, Italy 
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Elisabetta Dotto; M. Antonietta Barucci; Richard P. Binzel; Marco Delbó. Surface compositions of NEOs. Comptes Rendus. Physique, Volume 6 (2005) no. 3, pp. 303-312. doi : 10.1016/j.crhy.2004.12.015. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.12.015/

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