Bright carbonate veins on asteroid (101955) Bennu: Implications for aqueous alteration history

@article{Kaplan2020BrightCV,
  title={Bright carbonate veins on asteroid (101955) Bennu: Implications for aqueous alteration history},
  author={Hannah H. Kaplan and Dante S. Lauretta and Amy A. Simon and Victoria E. Hamilton and Daniella N. DellaGiustina and Dathon R. Golish and Dennis C. Reuter and Carina A. Bennett and Keara N. Burke and Humberto Campins and Harold C. Connolly and Jason P. Dworkin and J. P. Emery and Daniel P. Glavin and Timothy D. Glotch and Romy D. Hanna and K Ishimaru and Erica R. Jawin and Timothy J. Mccoy and N. A. Porter and Scott A. Sandford and Salvatore M. Ferrone and Beth Ellen Clark and J.-Y. Li and X.-D. Zou and Michael G. Daly and Olivier S. Barnouin and J. A. Seabrook and H. L. Enos},
  journal={Science},
  year={2020},
  volume={370}
}
The complex history of Bennu's surface The near-Earth asteroid (101955) Bennu is a carbon-rich body with a rubble pile structure, formed from debris ejected by an impact on a larger parent asteroid. The Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) spacecraft is designed to collect a sample of Bennu's surface and return it to Earth. After arriving at Bennu, OSIRIS-REx performed a detailed survey of the asteroid and reconnaissance of… Expand
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20 Citations

20 Citations

Citation Type

Citation Type

Widespread carbon-bearing materials on near-Earth asteroid (101955) Bennu
TLDR
The OSIRIS-REx results constrain Bennu's evolution and provide context for the sample collected in October 2020, as well as finding evidence for organic and carbonate materials that are widely distributed across the surface but are most concentrated on individual boulders. Expand
Variations in color and reflectance on the surface of asteroid (101955) Bennu
TLDR
Maps of color and albedo on asteroid Bennu indicate complex evolution of its surface due to space weathering, and constrain Bennu's evolution and provide context for the sample collected in October 2020. Expand
Evidence for limited compositional and particle size variation on asteroid (101955) Bennu from thermal infrared spectroscopy
Context. Asteroid (101955) Bennu is the target of NASA’s Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission. The spacecraft’s instruments… Expand
In search of Bennu analogs: Hapke modeling of meteorite mixtures
Context. The OSIRIS-REx Visible and InfraRed Spectrometer onboard the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer spacecraft obtained many spectra from… Expand
Asteroid (101955) Bennu’s weak boulders and thermally anomalous equator
TLDR
These findings imply that other C-complex NEAs likely have boulders similar to those on Bennu rather than finer-particulate regoliths, and a tentative correlation between albedo and thermal inertia of C- complex NEAs may be due to relative abundances of boulder types. Expand
High-resolution observations of bright boulders on asteroid Ryugu: 1. Size frequency distribution and morphology
Abstract The near-Earth asteroid (162173) Ryugu displays a Cb-type average spectrum and a very low average normal albedo of 0.04. Although the majority of boulders on Ryugu have reflectance spectra… Expand
Visible–near-infrared observations of organics and carbonates on (101955) Bennu: Classification method and search for surface context
Abstract The OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS) onboard the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) spacecraft… Expand
Hydrogen abundance estimation and distribution on (101955) Bennu
Abstract Asteroids were likely a major source of volatiles and water to early Earth. Quantifying the hydration of asteroids is necessary to constrain models of the formation and evolution of the… Expand
NORTHWEST AFRICA (NWA) 12563 and ungrouped C2 chondrites: Alteration styles and relationships to asteroids
Abstract Many asteroids in the main belt have spectra like those of Mighei-type CM chondrites, but some Near Earth Objects (NEO) resemble less well known types of C2 chondrite. Northwest Africa (NWA)… Expand
A high-resolution normal albedo map of asteroid (101955) Bennu
Abstract We present a near-global normal albedo map of asteroid (101955) Bennu, created using images from the PolyCam imager onboard the Origins, Spectral Interpretation, Resource Identification, and… Expand
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References

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Widespread carbon-bearing materials on near-Earth asteroid (101955) Bennu
TLDR
The OSIRIS-REx results constrain Bennu's evolution and provide context for the sample collected in October 2020, as well as finding evidence for organic and carbonate materials that are widely distributed across the surface but are most concentrated on individual boulders. Expand
Variations in color and reflectance on the surface of asteroid (101955) Bennu
TLDR
Maps of color and albedo on asteroid Bennu indicate complex evolution of its surface due to space weathering, and constrain Bennu's evolution and provide context for the sample collected in October 2020. Expand
The Unexpected Surface of Asteroid (101955) Bennu
TLDR
Early OSIRIS-REx observations of Bennu are considered to understand how the asteroid’s properties compare to pre-encounter expectations and to assess the prospects for sample return. Expand
Evidence for widespread hydrated minerals on asteroid (101955) Bennu
TLDR
Evidence for abundant hydrated minerals on the surface of near-Earth asteroid Bennu is revealed in the form of a near-infrared absorption near 2.7 µm and thermal infrared spectral features that are most similar to those of aqueously altered CM-type carbonaceous chondrites. Expand
Exogenic basalt on asteroid (101955) Bennu
When rubble-pile asteroid 2008 TC 3 impacted Earth on 7 October 2008, the recovered rock fragments indicated that such asteroids can contain exogenic material 1 , 2 . However, spacecraft missions to… Expand
Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis
Establishing the abundance and physical properties of regolith and boulders on asteroids is crucial for understanding the formation and degradation mechanisms at work on their surfaces. Using images… Expand
The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes
TLDR
Spectral observations and a principal components analysis suggest that Ryugu originates from the Eulalia or Polana asteroid family in the inner main belt, possibly via more than one generation of parent bodies. Expand
Asteroid (101955) Bennu’s weak boulders and thermally anomalous equator
TLDR
These findings imply that other C-complex NEAs likely have boulders similar to those on Bennu rather than finer-particulate regoliths, and a tentative correlation between albedo and thermal inertia of C- complex NEAs may be due to relative abundances of boulder types. Expand
Yamato 793321 CM chondrite: Dehydrated regolith material of a hydrous asteroid
Abstract Based on the reflectance spectra, surface materials of many C, G, B, and F-type asteroids are altered by heating and consist of low-crystalline dehydrated phyllosilicates, similar to heated… Expand
Physical, chemical, and petrological characteristics of chondritic materials and their relationships to small solar system bodies
Abstract Chondrite materials with varying abundances of volatile-bearing phases are expected at the destinations for the asteroid sample-return missions Hayabusa2 and OSIRIS-REx. The targets of the… Expand
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