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The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements

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The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements. / Scheeres, D; McMahon, J; The OSIRIS-REx Team; French, A; Brack, D; Chesley, S; Farnocchia, D; Takahashi, Y; Leonard, J; Geeraert, J; Page, B; Antreasian, P; Getzandanner, K; Rowlands, D; Mazarico, E; Small, J; Highsmith, D; Moreau, M; Emery, J; Rozitis, B; Hirabayashi, M; Sanchez, P; Van wal, S; Tricarico, P; Ballouz, R-L; Johnson, C; Al Asad, M; Susorney, Hannah; Barnouin, O; Daly, M; Seabrook, J; Gaskell, R; Palmer, E; Weirich, J; Walsh, K; Jawin, E; Bierhaus, E; Michel, P; Bottke, W; Nolan, M; Connolly, H; Lauretta, D.

In: Nature Astronomy, Vol. 3, No. 4, 04.2019, p. 352-361.

Research output: Contribution to journalArticle

Harvard

Scheeres, D, McMahon, J, The OSIRIS-REx Team, French, A, Brack, D, Chesley, S, Farnocchia, D, Takahashi, Y, Leonard, J, Geeraert, J, Page, B, Antreasian, P, Getzandanner, K, Rowlands, D, Mazarico, E, Small, J, Highsmith, D, Moreau, M, Emery, J, Rozitis, B, Hirabayashi, M, Sanchez, P, Van wal, S, Tricarico, P, Ballouz, R-L, Johnson, C, Al Asad, M, Susorney, H, Barnouin, O, Daly, M, Seabrook, J, Gaskell, R, Palmer, E, Weirich, J, Walsh, K, Jawin, E, Bierhaus, E, Michel, P, Bottke, W, Nolan, M, Connolly, H & Lauretta, D 2019, 'The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements', Nature Astronomy, vol. 3, no. 4, pp. 352-361. https://doi.org/10.1038/s41550-019-0721-3

APA

Scheeres, D., McMahon, J., The OSIRIS-REx Team, French, A., Brack, D., Chesley, S., ... Lauretta, D. (2019). The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements. Nature Astronomy, 3(4), 352-361. https://doi.org/10.1038/s41550-019-0721-3

Vancouver

Scheeres D, McMahon J, The OSIRIS-REx Team, French A, Brack D, Chesley S et al. The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements. Nature Astronomy. 2019 Apr;3(4):352-361. https://doi.org/10.1038/s41550-019-0721-3

Author

Scheeres, D ; McMahon, J ; The OSIRIS-REx Team ; French, A ; Brack, D ; Chesley, S ; Farnocchia, D ; Takahashi, Y ; Leonard, J ; Geeraert, J ; Page, B ; Antreasian, P ; Getzandanner, K ; Rowlands, D ; Mazarico, E ; Small, J ; Highsmith, D ; Moreau, M ; Emery, J ; Rozitis, B ; Hirabayashi, M ; Sanchez, P ; Van wal, S ; Tricarico, P ; Ballouz, R-L ; Johnson, C ; Al Asad, M ; Susorney, Hannah ; Barnouin, O ; Daly, M ; Seabrook, J ; Gaskell, R ; Palmer, E ; Weirich, J ; Walsh, K ; Jawin, E ; Bierhaus, E ; Michel, P ; Bottke, W ; Nolan, M ; Connolly, H ; Lauretta, D. / The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements. In: Nature Astronomy. 2019 ; Vol. 3, No. 4. pp. 352-361.

Bibtex

@article{d2b90055b5a543799460f3140a2c0cbb,
title = "The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements",
abstract = "The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Yet a detailed geophysical analysis of this morphology for a fast-spinning asteroid has not been possible prior to the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission. Combining the measured Bennu mass and shape obtained during the Preliminary Survey phase of the OSIRIS-REx mission, we find a notable transition in Bennu’s surface slopes within its rotational Roche lobe, defined as the region where material is energetically trapped to the surface. As the intersection of the rotational Roche lobe with Bennu’s surface has been most recently migrating towards its equator (given Bennu’s increasing spin rate), we infer that Bennu’s surface slopes have been changing across its surface within the last million years. We also find evidence for substantial density heterogeneity within this body, suggesting that its interior is a mixture of voids and boulders. The presence of such heterogeneity and Bennu’s top shape are consistent with spin-induced failure at some point in its past, although the manner of its failure cannot yet be determined. Future measurements by the OSIRIS-REx spacecraft will provide insight into and may resolve questions regarding the formation and evolution of Bennu’s top-shape morphology and its link to the formation of binary asteroids.",
author = "D Scheeres and J McMahon and {The OSIRIS-REx Team} and A French and D Brack and S Chesley and D Farnocchia and Y Takahashi and J Leonard and J Geeraert and B Page and P Antreasian and K Getzandanner and D Rowlands and E Mazarico and J Small and D Highsmith and M Moreau and J Emery and B Rozitis and M Hirabayashi and P Sanchez and {Van wal}, S and P Tricarico and R-L Ballouz and C Johnson and {Al Asad}, M and Hannah Susorney and O Barnouin and M Daly and J Seabrook and R Gaskell and E Palmer and J Weirich and K Walsh and E Jawin and E Bierhaus and P Michel and W Bottke and M Nolan and H Connolly and D Lauretta",
year = "2019",
month = "4",
doi = "10.1038/s41550-019-0721-3",
language = "English",
volume = "3",
pages = "352--361",
journal = "Nature Astronomy",
issn = "2397-3366",
publisher = "Springer Nature",
number = "4",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements

AU - Scheeres, D

AU - McMahon, J

AU - The OSIRIS-REx Team

AU - French, A

AU - Brack, D

AU - Chesley, S

AU - Farnocchia, D

AU - Takahashi, Y

AU - Leonard, J

AU - Geeraert, J

AU - Page, B

AU - Antreasian, P

AU - Getzandanner, K

AU - Rowlands, D

AU - Mazarico, E

AU - Small, J

AU - Highsmith, D

AU - Moreau, M

AU - Emery, J

AU - Rozitis, B

AU - Hirabayashi, M

AU - Sanchez, P

AU - Van wal, S

AU - Tricarico, P

AU - Ballouz, R-L

AU - Johnson, C

AU - Al Asad, M

AU - Susorney, Hannah

AU - Barnouin, O

AU - Daly, M

AU - Seabrook, J

AU - Gaskell, R

AU - Palmer, E

AU - Weirich, J

AU - Walsh, K

AU - Jawin, E

AU - Bierhaus, E

AU - Michel, P

AU - Bottke, W

AU - Nolan, M

AU - Connolly, H

AU - Lauretta, D

PY - 2019/4

Y1 - 2019/4

N2 - The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Yet a detailed geophysical analysis of this morphology for a fast-spinning asteroid has not been possible prior to the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission. Combining the measured Bennu mass and shape obtained during the Preliminary Survey phase of the OSIRIS-REx mission, we find a notable transition in Bennu’s surface slopes within its rotational Roche lobe, defined as the region where material is energetically trapped to the surface. As the intersection of the rotational Roche lobe with Bennu’s surface has been most recently migrating towards its equator (given Bennu’s increasing spin rate), we infer that Bennu’s surface slopes have been changing across its surface within the last million years. We also find evidence for substantial density heterogeneity within this body, suggesting that its interior is a mixture of voids and boulders. The presence of such heterogeneity and Bennu’s top shape are consistent with spin-induced failure at some point in its past, although the manner of its failure cannot yet be determined. Future measurements by the OSIRIS-REx spacecraft will provide insight into and may resolve questions regarding the formation and evolution of Bennu’s top-shape morphology and its link to the formation of binary asteroids.

AB - The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Yet a detailed geophysical analysis of this morphology for a fast-spinning asteroid has not been possible prior to the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission. Combining the measured Bennu mass and shape obtained during the Preliminary Survey phase of the OSIRIS-REx mission, we find a notable transition in Bennu’s surface slopes within its rotational Roche lobe, defined as the region where material is energetically trapped to the surface. As the intersection of the rotational Roche lobe with Bennu’s surface has been most recently migrating towards its equator (given Bennu’s increasing spin rate), we infer that Bennu’s surface slopes have been changing across its surface within the last million years. We also find evidence for substantial density heterogeneity within this body, suggesting that its interior is a mixture of voids and boulders. The presence of such heterogeneity and Bennu’s top shape are consistent with spin-induced failure at some point in its past, although the manner of its failure cannot yet be determined. Future measurements by the OSIRIS-REx spacecraft will provide insight into and may resolve questions regarding the formation and evolution of Bennu’s top-shape morphology and its link to the formation of binary asteroids.

U2 - 10.1038/s41550-019-0721-3

DO - 10.1038/s41550-019-0721-3

M3 - Article

VL - 3

SP - 352

EP - 361

JO - Nature Astronomy

JF - Nature Astronomy

SN - 2397-3366

IS - 4

ER -