Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

D. S. Lauretta; C. W. Hergenrother; S. R. Chesley; J. M. Leonard; J. Y. Pelgrift; C. D. Adam; M. Al Asad; P. G. Antreasian; R. L. Ballouz; K. J. Becker; C. A. Bennett; B. J. Bos; W. F. Bottke; M. Brozović; H. Campins; H. C. Connolly; M. G. Daly; A. B. Davis; J. de León; D. N. DellaGiustina; C. Y. Drouet d’Aubigny; J. P. Dworkin; J. P. Emery; D. Farnocchia; D. P. Glavin; D. R. Golish; C. M. Hartzell; R. A. Jacobson; E. R. Jawin; P. Jenniskens; J. N. Kidd; E. J. Lessac-Chenen; J. Y. Li; G. Libourel; J. Licandro; A. J. Liounis; C. K. Maleszewski; C. Manzoni; B. May; L. K. McCarthy; J. W. McMahon; P. Michel; J. L. Molaro; M. C. Moreau; D. S. Nelson; W. M. Owen; B. Rizk; H. L. Roper; B. Rozitis; E. M. Sahr; D. J. Scheeres; J. A. Seabrook; S. H. Selznick; Y. Takahashi; F. Thuillet; P. Tricarico; D. Vokrouhlický; C. W.V. Wolner

doi:10.1126/science.aay3544

Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

D. S. Lauretta, C. W. Hergenrother, S. R. Chesley, J. M. Leonard, J. Y. Pelgrift, C. D. Adam, M. Al Asad, P. G. Antreasian, R. L. Ballouz, K. J. Becker, C. A. Bennett, B. J. Bos, W. F. Bottke, M. Brozović, H. Campins, H. C. Connolly, M. G. Daly, A. B. Davis, J. de León, D. N. DellaGiustinaC. Y. Drouet d’Aubigny, J. P. Dworkin, J. P. Emery, D. Farnocchia, D. P. Glavin, D. R. Golish, C. M. Hartzell, R. A. Jacobson, E. R. Jawin, P. Jenniskens, J. N. Kidd, E. J. Lessac-Chenen, J. Y. Li, G. Libourel, J. Licandro, A. J. Liounis, C. K. Maleszewski, C. Manzoni, B. May, L. K. McCarthy, J. W. McMahon, P. Michel, J. L. Molaro, M. C. Moreau, D. S. Nelson, W. M. Owen, B. Rizk, H. L. Roper, B. Rozitis, E. M. Sahr, D. J. Scheeres, J. A. Seabrook, S. H. Selznick, Y. Takahashi, F. Thuillet, P. Tricarico, D. Vokrouhlický, C. W.V. Wolner

Astronomy and Planetary Sciences

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132 Scopus citations

Abstract

Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft. For the three largest observed events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteoroid impacts, thermal stress fracturing, and secondary impacts.

Original language	English (US)
Article number	eaay354
Journal	Science
Volume	366
Issue number	6470
DOIs	https://doi.org/10.1126/science.aay3544
State	Published - Dec 6 2019

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Lauretta, D. S., Hergenrother, C. W., Chesley, S. R., Leonard, J. M., Pelgrift, J. Y., Adam, C. D., Asad, M. A., Antreasian, P. G., Ballouz, R. L., Becker, K. J., Bennett, C. A., Bos, B. J., Bottke, W. F., Brozović, M., Campins, H., Connolly, H. C., Daly, M. G., Davis, A. B., de León, J., ... Wolner, C. W. V. (2019). Episodes of particle ejection from the surface of the active asteroid (101955) Bennu. Science, 366(6470), Article eaay354. https://doi.org/10.1126/science.aay3544

Lauretta, DS, Hergenrother, CW, Chesley, SR, Leonard, JM, Pelgrift, JY, Adam, CD, Asad, MA, Antreasian, PG, Ballouz, RL, Becker, KJ, Bennett, CA, Bos, BJ, Bottke, WF, Brozović, M, Campins, H, Connolly, HC, Daly, MG, Davis, AB, de León, J, DellaGiustina, DN, Drouet d’Aubigny, CY, Dworkin, JP, Emery, JP, Farnocchia, D, Glavin, DP, Golish, DR, Hartzell, CM, Jacobson, RA, Jawin, ER, Jenniskens, P, Kidd, JN, Lessac-Chenen, EJ, Li, JY, Libourel, G, Licandro, J, Liounis, AJ, Maleszewski, CK, Manzoni, C, May, B, McCarthy, LK, McMahon, JW, Michel, P, Molaro, JL, Moreau, MC, Nelson, DS, Owen, WM, Rizk, B, Roper, HL, Rozitis, B, Sahr, EM, Scheeres, DJ, Seabrook, JA, Selznick, SH, Takahashi, Y, Thuillet, F, Tricarico, P, Vokrouhlický, D & Wolner, CWV 2019, 'Episodes of particle ejection from the surface of the active asteroid (101955) Bennu', Science, vol. 366, no. 6470, eaay354. https://doi.org/10.1126/science.aay3544

@article{b45187da72ff4a6e808d0eb8b47d9ff7,

title = "Episodes of particle ejection from the surface of the active asteroid (101955) Bennu",

abstract = "Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft. For the three largest observed events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteoroid impacts, thermal stress fracturing, and secondary impacts.",

author = "Lauretta, {D. S.} and Hergenrother, {C. W.} and Chesley, {S. R.} and Leonard, {J. M.} and Pelgrift, {J. Y.} and Adam, {C. D.} and Asad, {M. Al} and Antreasian, {P. G.} and Ballouz, {R. L.} and Becker, {K. J.} and Bennett, {C. A.} and Bos, {B. J.} and Bottke, {W. F.} and M. Brozovi{\'c} and H. Campins and Connolly, {H. C.} and Daly, {M. G.} and Davis, {A. B.} and {de Le{\'o}n}, J. and DellaGiustina, {D. N.} and {Drouet d{\textquoteright}Aubigny}, {C. Y.} and Dworkin, {J. P.} and Emery, {J. P.} and D. Farnocchia and Glavin, {D. P.} and Golish, {D. R.} and Hartzell, {C. M.} and Jacobson, {R. A.} and Jawin, {E. R.} and P. Jenniskens and Kidd, {J. N.} and Lessac-Chenen, {E. J.} and Li, {J. Y.} and G. Libourel and J. Licandro and Liounis, {A. J.} and Maleszewski, {C. K.} and C. Manzoni and B. May and McCarthy, {L. K.} and McMahon, {J. W.} and P. Michel and Molaro, {J. L.} and Moreau, {M. C.} and Nelson, {D. S.} and Owen, {W. M.} and B. Rizk and Roper, {H. L.} and B. Rozitis and Sahr, {E. M.} and Scheeres, {D. J.} and Seabrook, {J. A.} and Selznick, {S. H.} and Y. Takahashi and F. Thuillet and P. Tricarico and D. Vokrouhlick{\'y} and Wolner, {C. W.V.}",

year = "2019",

month = dec,

day = "6",

doi = "10.1126/science.aay3544",

language = "English (US)",

volume = "366",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "6470",

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TY - JOUR

T1 - Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

AU - Lauretta, D. S.

AU - Hergenrother, C. W.

AU - Chesley, S. R.

AU - Leonard, J. M.

AU - Pelgrift, J. Y.

AU - Adam, C. D.

AU - Asad, M. Al

AU - Antreasian, P. G.

AU - Ballouz, R. L.

AU - Becker, K. J.

AU - Bennett, C. A.

AU - Bos, B. J.

AU - Bottke, W. F.

AU - Brozović, M.

AU - Campins, H.

AU - Connolly, H. C.

AU - Daly, M. G.

AU - Davis, A. B.

AU - de León, J.

AU - DellaGiustina, D. N.

AU - Drouet d’Aubigny, C. Y.

AU - Dworkin, J. P.

AU - Emery, J. P.

AU - Farnocchia, D.

AU - Glavin, D. P.

AU - Golish, D. R.

AU - Hartzell, C. M.

AU - Jacobson, R. A.

AU - Jawin, E. R.

AU - Jenniskens, P.

AU - Kidd, J. N.

AU - Lessac-Chenen, E. J.

AU - Li, J. Y.

AU - Libourel, G.

AU - Licandro, J.

AU - Liounis, A. J.

AU - Maleszewski, C. K.

AU - Manzoni, C.

AU - May, B.

AU - McCarthy, L. K.

AU - McMahon, J. W.

AU - Michel, P.

AU - Molaro, J. L.

AU - Moreau, M. C.

AU - Nelson, D. S.

AU - Owen, W. M.

AU - Rizk, B.

AU - Roper, H. L.

AU - Rozitis, B.

AU - Sahr, E. M.

AU - Scheeres, D. J.

AU - Seabrook, J. A.

AU - Selznick, S. H.

AU - Takahashi, Y.

AU - Thuillet, F.

AU - Tricarico, P.

AU - Vokrouhlický, D.

AU - Wolner, C. W.V.

PY - 2019/12/6

Y1 - 2019/12/6

N2 - Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft. For the three largest observed events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteoroid impacts, thermal stress fracturing, and secondary impacts.

AB - Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft. For the three largest observed events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteoroid impacts, thermal stress fracturing, and secondary impacts.

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U2 - 10.1126/science.aay3544

DO - 10.1126/science.aay3544

M3 - Article

C2 - 31806784

AN - SCOPUS:85076281089

SN - 0036-8075

VL - 366

JO - Science

JF - Science

IS - 6470

M1 - eaay354

ER -

Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

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