Shape of (101955) Bennu indicative of a rubble pile with internal stiffness
The shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mi...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| 其他作者: | |
| 格式: | Journal article |
| 语言: | English |
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Nature Research
2019
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| _version_ | 1826298562326036480 |
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| author | Barnouin, OS Daly, MG Palmer, EE Gaskell, RW Weirich, JR Johnson, CL Al Asad, MM Roberts, JH Perry, ME Susorney, HCM Daly, RT Bierhaus, EB Seabrook, JA Espiritu, RC Nair, AH Nguyen, L Neumann, GA Ernst, CM Boynton, WV Nolan, MC Adam, CD Moreau, MC Risk, B Drouet D'Aubigny, C Jawin, ER Walsh, KJ Michel, P Schwartz, SR Ballouz, R-L Mazarico, EM Scheeres, DJ McMahon, J Bottke, W Sugita, S Hirata, N Hirata, N Watanabe, S Burke, KN DellaGuistina, DN Bennett, CA Lauretta, DS OSIRIS-REx Team |
| author2 | Bowles, N |
| author_facet | Bowles, N Barnouin, OS Daly, MG Palmer, EE Gaskell, RW Weirich, JR Johnson, CL Al Asad, MM Roberts, JH Perry, ME Susorney, HCM Daly, RT Bierhaus, EB Seabrook, JA Espiritu, RC Nair, AH Nguyen, L Neumann, GA Ernst, CM Boynton, WV Nolan, MC Adam, CD Moreau, MC Risk, B Drouet D'Aubigny, C Jawin, ER Walsh, KJ Michel, P Schwartz, SR Ballouz, R-L Mazarico, EM Scheeres, DJ McMahon, J Bottke, W Sugita, S Hirata, N Hirata, N Watanabe, S Burke, KN DellaGuistina, DN Bennett, CA Lauretta, DS OSIRIS-REx Team |
| author_sort | Barnouin, OS |
| collection | OXFORD |
| description | The shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mission, Earth-based radar imaging gave an overview of (101955) Bennu’s shape. Here we construct a high-resolution shape model from OSIRIS-REx images. We find that Bennu’s top-like shape, considerable macroporosity and prominent surface boulders suggest that it is a rubble pile. High-standing, north–south ridges that extend from pole to pole, many long grooves and surface mass wasting indicate some low levels of internal friction and/or cohesion. Our shape model indicates that, similar to other top-shaped asteroids, Bennu formed by reaccumulation and underwent past periods of fast spin, which led to its current shape. Today, Bennu might follow a different evolutionary pathway, with an interior stiffness that permits surface cracking and mass wasting. |
| first_indexed | 2024-03-07T04:48:45Z |
| format | Journal article |
| id | oxford-uuid:d43c5be8-1c0f-47db-aef3-5a1da831ace2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:48:45Z |
| publishDate | 2019 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:d43c5be8-1c0f-47db-aef3-5a1da831ace22022-03-27T08:17:06ZShape of (101955) Bennu indicative of a rubble pile with internal stiffnessJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d43c5be8-1c0f-47db-aef3-5a1da831ace2EnglishSymplectic ElementsNature Research2019Barnouin, OSDaly, MGPalmer, EEGaskell, RWWeirich, JRJohnson, CLAl Asad, MMRoberts, JHPerry, MESusorney, HCMDaly, RTBierhaus, EBSeabrook, JAEspiritu, RCNair, AHNguyen, LNeumann, GAErnst, CMBoynton, WVNolan, MCAdam, CDMoreau, MCRisk, BDrouet D'Aubigny, CJawin, ERWalsh, KJMichel, PSchwartz, SRBallouz, R-LMazarico, EMScheeres, DJMcMahon, JBottke, WSugita, SHirata, NHirata, NWatanabe, SBurke, KNDellaGuistina, DNBennett, CALauretta, DSOSIRIS-REx TeamBowles, NThe shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mission, Earth-based radar imaging gave an overview of (101955) Bennu’s shape. Here we construct a high-resolution shape model from OSIRIS-REx images. We find that Bennu’s top-like shape, considerable macroporosity and prominent surface boulders suggest that it is a rubble pile. High-standing, north–south ridges that extend from pole to pole, many long grooves and surface mass wasting indicate some low levels of internal friction and/or cohesion. Our shape model indicates that, similar to other top-shaped asteroids, Bennu formed by reaccumulation and underwent past periods of fast spin, which led to its current shape. Today, Bennu might follow a different evolutionary pathway, with an interior stiffness that permits surface cracking and mass wasting. |
| spellingShingle | Barnouin, OS Daly, MG Palmer, EE Gaskell, RW Weirich, JR Johnson, CL Al Asad, MM Roberts, JH Perry, ME Susorney, HCM Daly, RT Bierhaus, EB Seabrook, JA Espiritu, RC Nair, AH Nguyen, L Neumann, GA Ernst, CM Boynton, WV Nolan, MC Adam, CD Moreau, MC Risk, B Drouet D'Aubigny, C Jawin, ER Walsh, KJ Michel, P Schwartz, SR Ballouz, R-L Mazarico, EM Scheeres, DJ McMahon, J Bottke, W Sugita, S Hirata, N Hirata, N Watanabe, S Burke, KN DellaGuistina, DN Bennett, CA Lauretta, DS OSIRIS-REx Team Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title | Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title_full | Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title_fullStr | Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title_full_unstemmed | Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title_short | Shape of (101955) Bennu indicative of a rubble pile with internal stiffness |
| title_sort | shape of 101955 bennu indicative of a rubble pile with internal stiffness |
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