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DOI	10.1126/science.abc3660
	Variations in color and reflectance on the surface of asteroid (101955) Bennu
	Dellagiustina D.N.; Burke K.N.; Walsh K.J.; Smith P.H.; Golish D.R.; Bierhaus E.B.; Ballouz R.-L.; Becker T.L.; Campins H.; Tatsumi E.; Yumoto K.; Sugita S.; Deshapriya J.D.P.; Cloutis E.A.; Clark B.E.; Hendrix A.R.; Sen A.; Asad M.M.A.; Daly M.G.; Applin D.M.; Avdellidou C.; Barucci M.A.; Becker K.J.; Bennett C.A.; Bottke W.F.; Brodbeck J.I.; Connolly H.C.; Delbo M.; De Leon J.D.; D'Aubigny C.Y.D.; Edmundson K.L.; Fornasier S.; Hamilton V.E.; Hasselmann P.H.; Hergenrother C.W.; Howell E.S.; Jawin E.R.; Kaplan H.H.; Corre L.L.; Lim L.F.; Li J.Y.; Michel P.; Molaro J.L.; Nolan M.C.; Nolau J.; Pajola M.; Parkinson A.; Popescu M.; Porter N.A.; Rizk B.; Rizos J.L.; Ryan A.J.; Rozitis B.; Shultz N.K.; Simon A.A.; Trang D.; Van Auken R.B.; Wolner C.W.V.; Lauretta D.S.
发表日期	2020
ISSN	0036-8075
卷号	370 期号:6517
英文摘要	Visible-wavelength color and reflectance provide information about the geologic history of planetary surfaces. Here we present multispectral images (0.44 to 0.89 micrometers) of near-Earth asteroid (101955) Bennu. The surface has variable colors overlain on a moderately blue global terrain. Two primary boulder types are distinguishable by their reflectance and texture. Space weathering of Bennu surface materials does not simply progress from red to blue (or vice versa). Instead, freshly exposed, redder surfaces initially brighten in the near-ultraviolet region (i.e., become bluer at shorter wavelengths), then brighten in the visible to near-infrared region, leading to Bennu's moderately blue average color. Craters indicate that the time scale of these color changes is ~105 years. We attribute the reflectance and color variation to a combination of primordial heterogeneity and varying exposure ages. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	asteroid; boulder; color; heterogeneity; spectral reflectance; ultraviolet radiation; weathering; article; infrared radiation; ultraviolet radiation; weathering; Asteroidea
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243505
作者单位	Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Department of Geosciences, University of Arizona, Tucson, AZ, United States; Southwest Research Institute, Boulder, CO, United States; Lockheed Martin Space, Littleton, CO, United States; Department of Physics, University of Central Florida, Orlando, FL, United States; Instituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de la Laguna, Tenerife, Spain; Department of Earth and Planetary Science, University of Tokyo, Tokyo, 113-0033, Japan; Lesia (Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique), Cnrs (Centre National de la Recherche Scientifique), Université Psl (Paris Sciences and Lettres), Meudon, 92195, France; Department of Geography, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada; Department of Physics and Astronomy, Ithaca College, Ithaca, NY, United States; Planetary Science Institute, Tucson, AZ, United States; Department of Earth, University of British Columbia,...
推荐引用方式 GB/T 7714	Dellagiustina D.N.,Burke K.N.,Walsh K.J.,et al. Variations in color and reflectance on the surface of asteroid (101955) Bennu[J],2020,370(6517).
APA	Dellagiustina D.N..,Burke K.N..,Walsh K.J..,Smith P.H..,Golish D.R..,...&Lauretta D.S..(2020).Variations in color and reflectance on the surface of asteroid (101955) Bennu.Science,370(6517).
MLA	Dellagiustina D.N.,et al."Variations in color and reflectance on the surface of asteroid (101955) Bennu".Science 370.6517(2020).