GSTDTAP  > 气候变化
DOI10.1029/2020GL089672
The morphometry of impact craters on Bennu
R. T. Daly; E. B. Bierhaus; O. S. Barnouin; M. G. Daly; J. A. Seabrook; J. H. Roberts; C. M. Ernst; M. E. Perry; H. Nair; R. C. Espiritu; E. E. Palmer; R. W. Gaskell; J. R. Weirich; H. C. M. Susorney; C. L. Johnson; K. J. Walsh; M. C. Nolan; E. R. Jawin; P. Michel; D. Trang; D. S. Lauretta
2020-11-20
发表期刊Geophysical Research Letters
出版年2020
英文摘要

Bennu is a ~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.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/304302
专题气候变化
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R. T. Daly,E. B. Bierhaus,O. S. Barnouin,et al. The morphometry of impact craters on Bennu[J]. Geophysical Research Letters,2020.
APA R. T. Daly.,E. B. Bierhaus.,O. S. Barnouin.,M. G. Daly.,J. A. Seabrook.,...&D. S. Lauretta.(2020).The morphometry of impact craters on Bennu.Geophysical Research Letters.
MLA R. T. Daly,et al."The morphometry of impact craters on Bennu".Geophysical Research Letters (2020).
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