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...
| Үндсэн зохиолчид: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Бусад зохиолчид: | |
| Формат: | Journal article |
| Хэл сонгох: | English |
| Хэвлэсэн: |
Nature Research
2019
|
| _version_ | 1826298562326036480 |
|---|---|
| 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 |
| work_keys_str_mv | AT barnouinos shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT dalymg shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT palmeree shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT gaskellrw shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT weirichjr shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT johnsoncl shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT alasadmm shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT robertsjh shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT perryme shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT susorneyhcm shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT dalyrt shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT bierhauseb shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT seabrookja shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT espiriturc shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT nairah shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT nguyenl shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT neumannga shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT ernstcm shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT boyntonwv shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT nolanmc shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT adamcd shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT moreaumc shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT riskb shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT drouetdaubignyc shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT jawiner shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT walshkj shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT michelp shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT schwartzsr shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT ballouzrl shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT mazaricoem shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT scheeresdj shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT mcmahonj shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT bottkew shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT sugitas shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT hiratan shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT hiratan shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT watanabes shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT burkekn shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT dellaguistinadn shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT bennettca shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT laurettads shapeof101955bennuindicativeofarubblepilewithinternalstiffness AT osirisrexteam shapeof101955bennuindicativeofarubblepilewithinternalstiffness |