气候变化领域集成服务门户(CCPortal): The Morphometry of Impact Craters on Bennu

CCPortal

DOI	10.1029/2020GL089672
	The Morphometry of Impact Craters on Bennu
	Daly R.T.; Bierhaus E.B.; Barnouin O.S.; Daly M.G.; Seabrook J.A.; Roberts J.H.; Ernst C.M.; Perry M.E.; Nair H.; Espiritu R.C.; Palmer E.E.; Gaskell R.W.; Weirich J.R.; Susorney H.C.M.; Johnson C.L.; Walsh K.J.; Nolan M.C.; Jawin E.R.; Michel P.; Trang D.; Lauretta D.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:24
英文摘要	Bennu 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.
英文关键词	Aneroid altimeters; Asteroids; Crater sizes; Diameter ratio; Impact craters; Large-scales; Laser altimeter; Rubble pile; Spectral interpretation; Target strength; Piles; asteroid; crater; data interpretation; morphometry; substrate; target strength; Asteroidea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169285
作者单位	Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States; Lockheed Martin Space, Littleton, CO, United States; Centre for Research in Earth and Space Science, York University, Toronto, ON, Canada; Planetary Science Institute, Tucson, AZ, United States; School of Earth Sciences, University of Bristol, Bristol, United Kingdom; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Southwest Research Institute, Boulder, CO, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Smithsonian Institution National Museum of Natural History, Washington, DC, United States; Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Université Côte d'Azur, Nice, France; Hawai'i Institute of Geophysics and Planetology, University of Hawaiʻi at Mānoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Daly R.T.,Bierhaus E.B.,Barnouin O.S.,et al. The Morphometry of Impact Craters on Bennu[J],2020,47(24).
APA	Daly R.T..,Bierhaus E.B..,Barnouin O.S..,Daly M.G..,Seabrook J.A..,...&Lauretta D.S..(2020).The Morphometry of Impact Craters on Bennu.Geophysical Research Letters,47(24).
MLA	Daly R.T.,et al."The Morphometry of Impact Craters on Bennu".Geophysical Research Letters 47.24(2020).