@article{43bd78e380db425db7c02701aaa7db8c,
title = "Asteroid (101955) Bennu's weak boulders and thermally anomalous equator",
abstract = "Thermal inertia and surface roughness are proxies for the physical characteristics of planetary surfaces. Global maps of these two properties distinguish the boulder population on near-Earth asteroid (NEA) (101955) Bennu into two types that differ in strength, and both have lower thermal inertia than expected for boulders and meteorites. Neither has strongly temperature-dependent thermal properties. The weaker boulder type probably would not survive atmospheric entry and thus may not be represented in the meteorite collection. The maps also show a high-thermal inertia band at Bennu's equator, which might be explained by processes such as compaction or strength sorting during mass movement, but these explanations are not wholly consistent with other data. Our findings imply that other C-complex NEAs likely have boulders similar to those on Bennu rather than finer-particulate regoliths. A tentative correlation between albedo and thermal inertia of C-complex NEAs may be due to relative abundances of boulder types.",
author = "B. Rozitis and Ryan, {A. J.} and Emery, {J. P.} and Christensen, {P. R.} and Hamilton, {V. E.} and Simon, {A. A.} and Reuter, {D. C.} and {Al Asad}, M. and Ballouz, {R. L.} and Bandfield, {J. L.} and Barnouin, {O. S.} and Bennett, {C. A.} and M. Bernacki and Burke, {K. N.} and S. Cambioni and Clark, {B. E.} and Daly, {M. G.} and M. Delbo and DellaGiustina, {D. N.} and Elder, {C. M.} and Hanna, {R. D.} and Haberle, {C. W.} and Howell, {E. S.} and Golish, {D. R.} and Jawin, {E. R.} and Kaplan, {H. H.} and Lim, {L. F.} and Molaro, {J. L.} and {Pino Munoz}, D. and Nolan, {M. C.} and B. Rizk and Siegler, {M. A.} and Susorney, {H. C.M.} and Walsh, {K. J.} and Lauretta, {D. S.}",
note = "Funding Information: We are grateful to the entire OSIRIS-REx Team for making the encounter with Bennu possible, C. Wolner for editorial help, and H. Roper and D. Worden for help with figure formatting. We thank the J-Asteroid/JMARS development team for assistance with the production of map figures. Funding: This material is based on work supported by NASA under contract NNM10AA11C issued through the New Frontiers Program. Some of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. B.Ro. acknowledges funding support from the Royal Astronomical Society (RAS) and the U.K. Science and Technology Facilities Council (STFC). A.J.R., M.B., M.D., and D.P.M. acknowledge support from the Academies of Excellence on Complex Systems and Space, Environment, Risk and Resilience of the Initiative d'EXcellence (IDEX) Joint, Excellent, and Dynamic Initiative (JEDI) of the Universit{\'e} C{\^o}te d'Azur and from the Centre National d'{\'E}tudes Spatiales (CNES). The work of M.D. was partially supported by ORIGINS of the Agence National de la Recherche (ANR-18-CE31-0014). J.L.B., C.M.E., R.D.H., J.L.M., and M.A.S. were supported by the OSIRIS-REx Participating Scientist Program Publisher Copyright: {\textcopyright} 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).",
year = "2020",
month = oct,
day = "7",
doi = "10.1126/sciadv.abc3699",
language = "English (US)",
volume = "6",
journal = "Science advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "41",
}