Possible evidence for partial differentiation of asteroid Lutetia from Rosetta

Benjamin P. Weiss; Linda T. Elkins-Tanton; M. Antonietta Barucci; Holger Sierks; Colin Snodgrass; Jean Baptiste Vincent; Simone Marchi; Paul R. Weissman; Martin Pätzold; Ingo Richter; Marcello Fulchignoni; Richard P. Binzel; Rita Schulz

doi:10.1016/j.pss.2011.09.012

Possible evidence for partial differentiation of asteroid Lutetia from Rosetta

Benjamin P. Weiss, Linda T. Elkins-Tanton, M. Antonietta Barucci, Holger Sierks, Colin Snodgrass, Jean Baptiste Vincent, Simone Marchi, Paul R. Weissman, Martin Pätzold, Ingo Richter, Marcello Fulchignoni, Richard P. Binzel, Rita Schulz

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

53 Scopus citations

Abstract

The petrologic diversity of meteorites demonstrates that planetesimals ranged from unmelted, variably metamorphosed aggregates to fully molten, differentiated bodies. However, partially differentiated bodies have not been unambiguously identified in the asteroid belt. New constraints on the density, composition, and morphology of 21 Lutetia from the Rosetta spacecraft indicate that the asteroid's high bulk density exceeds that of most known chondritic meteorite groups, yet its surface properties resemble those of some carbonaceous and enstatite chondrite groups. This indicates that Lutetia likely experienced early compaction processes like metamorphic sintering. It may have also partially differentiated, forming a metallic core overlain by a primitive chondritic crust.

Original language	English (US)
Pages (from-to)	137-146
Number of pages	10
Journal	Planetary and Space Science
Volume	66
Issue number	1
DOIs	https://doi.org/10.1016/j.pss.2011.09.012
State	Published - Jun 2012
Externally published	Yes

Keywords

Asteroids
Chondrites
Differentiation
Lutetia
Metamorphism
Planetary evolution
Planetesimals
Rosetta

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1016/j.pss.2011.09.012

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Weiss, B. P., Elkins-Tanton, L. T., Antonietta Barucci, M., Sierks, H., Snodgrass, C., Vincent, J. B., Marchi, S., Weissman, P. R., Pätzold, M., Richter, I., Fulchignoni, M., Binzel, R. P., & Schulz, R. (2012). Possible evidence for partial differentiation of asteroid Lutetia from Rosetta. Planetary and Space Science, 66(1), 137-146. https://doi.org/10.1016/j.pss.2011.09.012

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abstract = "The petrologic diversity of meteorites demonstrates that planetesimals ranged from unmelted, variably metamorphosed aggregates to fully molten, differentiated bodies. However, partially differentiated bodies have not been unambiguously identified in the asteroid belt. New constraints on the density, composition, and morphology of 21 Lutetia from the Rosetta spacecraft indicate that the asteroid's high bulk density exceeds that of most known chondritic meteorite groups, yet its surface properties resemble those of some carbonaceous and enstatite chondrite groups. This indicates that Lutetia likely experienced early compaction processes like metamorphic sintering. It may have also partially differentiated, forming a metallic core overlain by a primitive chondritic crust.",

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author = "Weiss, {Benjamin P.} and Elkins-Tanton, {Linda T.} and {Antonietta Barucci}, M. and Holger Sierks and Colin Snodgrass and Vincent, {Jean Baptiste} and Simone Marchi and Weissman, {Paul R.} and Martin P{\"a}tzold and Ingo Richter and Marcello Fulchignoni and Binzel, {Richard P.} and Rita Schulz",

note = "Funding Information: BPW thanks the Rosetta team for their generous collaboration, the NASA Origins Program for support, A. Rubin, I. Sanders and other anonymous reviewers for helpful suggestions about the manuscript, and Y. Bernabe, W. Durham, and B. Evans for discussions about rock mechanics. PRW was supported by the NASA U.S. Rosetta Project at the Jet Propulsion Laboratory under contract with NASA.",

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doi = "10.1016/j.pss.2011.09.012",

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AU - Vincent, Jean Baptiste

AU - Marchi, Simone

AU - Weissman, Paul R.

AU - Pätzold, Martin

AU - Richter, Ingo

AU - Fulchignoni, Marcello

AU - Binzel, Richard P.

AU - Schulz, Rita

N1 - Funding Information: BPW thanks the Rosetta team for their generous collaboration, the NASA Origins Program for support, A. Rubin, I. Sanders and other anonymous reviewers for helpful suggestions about the manuscript, and Y. Bernabe, W. Durham, and B. Evans for discussions about rock mechanics. PRW was supported by the NASA U.S. Rosetta Project at the Jet Propulsion Laboratory under contract with NASA.

PY - 2012/6

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KW - Chondrites

KW - Differentiation

KW - Lutetia

KW - Metamorphism

KW - Planetary evolution

KW - Planetesimals

KW - Rosetta

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Possible evidence for partial differentiation of asteroid Lutetia from Rosetta

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Keywords

ASJC Scopus subject areas

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