An estimate of Eros's porosity and implications for internal structure

Sarah L. Wilkison; Mark S. Robinson; Peter C. Thomas; Joseph Veverka; Timothy J. McCoy; Scott L. Murchie; Louise M. Prockter; Donald K. Yeomans

doi:10.1006/icar.2001.6751

An estimate of Eros's porosity and implications for internal structure

Sarah L. Wilkison, Mark S. Robinson, Peter C. Thomas, Joseph Veverka, Timothy J. McCoy, Scott L. Murchie, Louise M. Prockter, Donald K. Yeomans

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

Earth-based spectral measurements and NEAR Shoemaker magnetometer, X-ray, and near-infrared spectrometer data are all consistent with Eros having a bulk composition and mineralogy similar to ordinary chondrite meteorites (OC). By comparing the bulk density of 433 Eros (2.67 ± 0.03 g/cm³) with that of OCs (3.40 g/cm³), we estimate the total porosity of the asteroid to be 21-33%. Macro (or structural) porosity, best estimated to be ∼20%, is constrained to be between 6 and 33%. We conclude that Eros is a heavily fractured body, but we find no evidence that it was ever catastrophically disrupted and reaccumulated into a rubble pile.

Original language	English (US)
Pages (from-to)	94-103
Number of pages	10
Journal	Icarus
Volume	155
Issue number	1
DOIs	https://doi.org/10.1006/icar.2001.6751
State	Published - 2002
Externally published	Yes

Keywords

Asteroids
Eros
Interiors
Meteorites
Surfaces

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1006/icar.2001.6751

Cite this

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abstract = "Earth-based spectral measurements and NEAR Shoemaker magnetometer, X-ray, and near-infrared spectrometer data are all consistent with Eros having a bulk composition and mineralogy similar to ordinary chondrite meteorites (OC). By comparing the bulk density of 433 Eros (2.67 ± 0.03 g/cm3) with that of OCs (3.40 g/cm3), we estimate the total porosity of the asteroid to be 21-33%. Macro (or structural) porosity, best estimated to be ∼20%, is constrained to be between 6 and 33%. We conclude that Eros is a heavily fractured body, but we find no evidence that it was ever catastrophically disrupted and reaccumulated into a rubble pile.",

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T1 - An estimate of Eros's porosity and implications for internal structure

AU - Wilkison, Sarah L.

AU - Robinson, Mark S.

AU - Thomas, Peter C.

AU - Veverka, Joseph

AU - McCoy, Timothy J.

AU - Murchie, Scott L.

AU - Prockter, Louise M.

AU - Yeomans, Donald K.

PY - 2002

Y1 - 2002

N2 - Earth-based spectral measurements and NEAR Shoemaker magnetometer, X-ray, and near-infrared spectrometer data are all consistent with Eros having a bulk composition and mineralogy similar to ordinary chondrite meteorites (OC). By comparing the bulk density of 433 Eros (2.67 ± 0.03 g/cm3) with that of OCs (3.40 g/cm3), we estimate the total porosity of the asteroid to be 21-33%. Macro (or structural) porosity, best estimated to be ∼20%, is constrained to be between 6 and 33%. We conclude that Eros is a heavily fractured body, but we find no evidence that it was ever catastrophically disrupted and reaccumulated into a rubble pile.

AB - Earth-based spectral measurements and NEAR Shoemaker magnetometer, X-ray, and near-infrared spectrometer data are all consistent with Eros having a bulk composition and mineralogy similar to ordinary chondrite meteorites (OC). By comparing the bulk density of 433 Eros (2.67 ± 0.03 g/cm3) with that of OCs (3.40 g/cm3), we estimate the total porosity of the asteroid to be 21-33%. Macro (or structural) porosity, best estimated to be ∼20%, is constrained to be between 6 and 33%. We conclude that Eros is a heavily fractured body, but we find no evidence that it was ever catastrophically disrupted and reaccumulated into a rubble pile.

KW - Asteroids

KW - Eros

KW - Interiors

KW - Meteorites

KW - Surfaces

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An estimate of Eros's porosity and implications for internal structure

Abstract

Keywords

ASJC Scopus subject areas

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