Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros

P. C. Thomas; J. Veverka; M. S. Robinson; S. Murchie

doi:10.1038/35096513

Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros

P. C. Thomas, J. Veverka, M. S. Robinson, S. Murchie

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107 Scopus citations

Abstract

The loose material - regolith - on the surfaces of asteroids is thought to represent ballistically emplaced ejecta from impacts but the identification of source craters and the detailed study of the regolith modification have been hampered by the limited spatial resolution and area coverage of the few asteroids imaged by spacecraft. Here we report the results of global mapping of the asteroid 433 Eros from high-resolution images obtained by the NEAR-Shoemaker spacecraft. Based on the images and ejecta-emplacement models, we suggest that most large ejecta blocks on Eros originate from a relatively young 7.6-km-diameter crater. A large fraction of the ejecta from impacts pre-dating that crater has apparently been buried or eroded. The images also show evidence for the action of a variety of sorting environments for regolith particles after they are deposited on the surface.

Original language	English (US)
Pages (from-to)	394-396
Number of pages	3
Journal	Nature
Volume	413
Issue number	6854
DOIs	https://doi.org/10.1038/35096513
State	Published - Sep 27 2001
Externally published	Yes

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title = "Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros",

abstract = "The loose material - regolith - on the surfaces of asteroids is thought to represent ballistically emplaced ejecta from impacts but the identification of source craters and the detailed study of the regolith modification have been hampered by the limited spatial resolution and area coverage of the few asteroids imaged by spacecraft. Here we report the results of global mapping of the asteroid 433 Eros from high-resolution images obtained by the NEAR-Shoemaker spacecraft. Based on the images and ejecta-emplacement models, we suggest that most large ejecta blocks on Eros originate from a relatively young 7.6-km-diameter crater. A large fraction of the ejecta from impacts pre-dating that crater has apparently been buried or eroded. The images also show evidence for the action of a variety of sorting environments for regolith particles after they are deposited on the surface.",

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T1 - Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros

AU - Thomas, P. C.

AU - Veverka, J.

AU - Robinson, M. S.

AU - Murchie, S.

PY - 2001/9/27

Y1 - 2001/9/27

N2 - The loose material - regolith - on the surfaces of asteroids is thought to represent ballistically emplaced ejecta from impacts but the identification of source craters and the detailed study of the regolith modification have been hampered by the limited spatial resolution and area coverage of the few asteroids imaged by spacecraft. Here we report the results of global mapping of the asteroid 433 Eros from high-resolution images obtained by the NEAR-Shoemaker spacecraft. Based on the images and ejecta-emplacement models, we suggest that most large ejecta blocks on Eros originate from a relatively young 7.6-km-diameter crater. A large fraction of the ejecta from impacts pre-dating that crater has apparently been buried or eroded. The images also show evidence for the action of a variety of sorting environments for regolith particles after they are deposited on the surface.

AB - The loose material - regolith - on the surfaces of asteroids is thought to represent ballistically emplaced ejecta from impacts but the identification of source craters and the detailed study of the regolith modification have been hampered by the limited spatial resolution and area coverage of the few asteroids imaged by spacecraft. Here we report the results of global mapping of the asteroid 433 Eros from high-resolution images obtained by the NEAR-Shoemaker spacecraft. Based on the images and ejecta-emplacement models, we suggest that most large ejecta blocks on Eros originate from a relatively young 7.6-km-diameter crater. A large fraction of the ejecta from impacts pre-dating that crater has apparently been buried or eroded. The images also show evidence for the action of a variety of sorting environments for regolith particles after they are deposited on the surface.

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Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros

Abstract

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