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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28900
Title: Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis
Authors: Dellagiustina, D. N.
Emery, J. P.
Golish, D. R.
Rozitis, B.
Bennett, C. A.
Burke, K. N.
Ballouz, R. -L.
Becker, K. J.
Christensen, P. R.
Drouet D'Aubigny, C. Y.
Hamilton, V. E.
Reuter, D. C.
Rizk, B.
Simon, A. A.
Asphaug, E.
Bandfield, J. L.
Barnouin, O. S.
Barucci, M. A.
Bierhaus, E. B.
Binzel, R. P.
Bottke, W. F.
Bowles, N. E.
Campins, H.
Clark, B. C.
Clark, B. E.
Connolly, H. C.
Daly, M. G.
Leon, J. De
Delbo', M.
Deshapriya, J. D. P.
Elder, C. M.
Fornasier, S.
Hergenrother, C. W.
Howell, E. S.
Jawin, E. R.
Kaplan, H. H.
Kareta, T. R.
Le Corre, L.
Li, J. -Y.
Licandro, J.
Lim, L. F.
Michel, P.
Molaro, J.
Nolan, M. C.
PAJOLA, MAURIZIO 
Popescu, M.
Garcia, J. L. Rizos
Ryan, A.
Schwartz, S. R.
Shultz, N.
Siegler, M. A.
Smith, P. H.
Tatsumi, E.
Thomas, C. A.
Walsh, K. J.
Wolner, C. W. V.
Zou, X. -D.
Lauretta, D. S.
Osiris-Rex Team
Issue Date: 2019
Journal: NATURE ASTRONOMY 
Number: 3
First Page: 341
Abstract: 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 and thermal data from NASA's Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft, we show that asteroid (101955) Bennu's surface is globally rough, dense with boulders, and low in albedo. The number of boulders is surprising given Bennu's moderate thermal inertia, suggesting that simple models linking thermal inertia to particle size do not adequately capture the complexity relating these properties. At the same time, we find evidence for a wide range of particle sizes with distinct albedo characteristics. Our findings imply that ages of Bennu's surface particles span from the disruption of the asteroid's parent body (boulders) to recent in situ production (micrometre-scale particles).
URI: http://hdl.handle.net/20.500.12386/28900
URL: https://www.nature.com/articles/s41550-019-0731-1
ISSN: 2397-3366
DOI: 10.1038/s41550-019-0731-1
Bibcode ADS: 2019NatAs...3..341D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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DellaGiustina_et_al_2019_Imaging_Thermal_Bennu.pdfpostprint4.83 MBAdobe PDFView/Open
Nat. Astr. s41550-019-0731-1.pdf[Administrators only]4.95 MBAdobe PDF
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