AffiliationLunar and Planetary Laboratory, University of Arizona
MetadataShow full item record
PublisherBlackwell Publishing Ltd
CitationDaly, R. T., Bierhaus, E. B., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Roberts, J. H., ... & Lauretta, D. S. (2020). The morphometry of impact craters on Bennu. Geophysical Research Letters, 47(24), e2020GL089672.
JournalGeophysical Research Letters
RightsCopyright © 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractBennu is an ~500-m-diameter rubble-pile asteroid that is the target of detailed study by the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission. Here we use data from the OSIRIS-REx Laser Altimeter to assess depth-to-diameter ratios (d/D) of 108 impact craters larger than 10 m in diameter. The d/D of craters on Bennu ranges from 0.02 to 0.19. The mean is 0.10 ± 0.03. The smallest craters show the broadest range in d/D, consistent with d/D measurements on other asteroids. A few craters have central mounds, which is interpreted as evidence that a more competent substrate lies a few meters beneath them. The range of d/D narrows as crater size increases, with craters larger than 80 m tending toward smaller d/D. At large scales, increases in target strength with depth, combined with target curvature, may affect crater morphometry. © 2020. The Authors.
NoteOpen access article
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Except where otherwise noted, this item's license is described as Copyright © 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.