NEO sizes, shapes and surface physical properties

A. Chantal Levasseur-Regourd; Marcello Fulchignoni; Marco Delbó; Richard P. Binzel

doi:10.1016/j.crhy.2005.01.003

The Near Earth Objects: possible impactors of the Earth/Les astéroïdes geocroiseurs : impacteurs potentiels de la Terre

NEO sizes, shapes and surface physical properties

Présenté par : Pierre Encrenaz

A. Chantal Levasseur-Regourd ¹ ; Marcello Fulchignoni ² ; Marco Delbó ³ ; Richard P. Binzel ⁴

¹ Université P. et M. Curie, Aéronomie CNRS-IPSL, BP 3, 91371 Verrières, France
² LESIA, Observatoire de Paris, 5, place J. Janssen, 92195 Meudon Principal cedex, France
³ INAF, Osservatorio Astronomico di Torino, via Osservatorio 20, 10025 Pino Torinese, Italy
⁴ MIT-EAPS, 77, Massachusetts avenue, Cambridge, MA 02139, USA

Comptes Rendus. Physique, Volume 6 (2005) no. 3, pp. 313-320.

Résumé
Abstract

Les tailles, formes et propriétés de surface ou sous surface des géocroiseurs sont encore mal connues, dans la mesure où leur détermination repose sur l'exploration locale. Ces objets irréguliers (essentiellement des astéroïdes, mais aussi des noyaux cométaires inactifs) ont des tailles allant de quelques kilomètres à quelques mètres, avec environ un millier d'entre eux dépassant le kilomètre. Les surfaces semblent assez rugueuses et sont couvertes, au moins partiellement, de régolites.

The sizes, shapes, and surface or subsurface properties of Near Earth Objects (mostly asteroids, also inactive comet nuclei) are still poorly known, since any accurate determination requires in situ missions. It may nevertheless be estimated that the sizes of these irregular bodies range from a few tens of kilometres to a few tens of meters, with possibly about 1000 NEOs with sizes greater than 1 km. Their surfaces are estimated to be quite rough, and at least partially covered with regolith.

Publié le : 2005-02-25

DOI : 10.1016/j.crhy.2005.01.003

Keywords: Asteroids, Comets, NEOs, Size, Shape, Surface physical properties
Mots clés : Astéroïdes, Comètes, Géocroiseurs, Taille, Forme, Propriétés physiques de surface

Affiliations des auteurs :

A. Chantal Levasseur-Regourd ¹ ; Marcello Fulchignoni ² ; Marco Delbó ³ ; Richard P. Binzel ⁴

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A. Chantal Levasseur-Regourd; Marcello Fulchignoni; Marco Delbó; Richard P. Binzel. NEO sizes, shapes and surface physical properties. Comptes Rendus. Physique, Volume 6 (2005) no. 3, pp. 313-320. doi : 10.1016/j.crhy.2005.01.003. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2005.01.003/

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