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Asymmetric Craters on the Dwarf Planet Ceres—Results of Second Extended Mission Data Analysis

Krohn, Katrin and Jaumann, Ralf and Wickhusen, Kai and Otto, Katharina A. and Kersten, Elke and Stephan, Katrin and Wagner, Roland and Raymond, Carol A. and Russell, Christopher T. (2019) Asymmetric Craters on the Dwarf Planet Ceres—Results of Second Extended Mission Data Analysis. Geosciences, 9 (11), p. 475. MDPI (Multidisciplinary Digital Publishing Institute). DOI: 10.3390/geosciences9110475 ISSN 2076-3263

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Official URL: https://www.mdpi.com/2076-3263/9/11/475

Abstract

After almost three years of successful operation on Ceres, the Dawn spacecraft entered its last orbits around the dwarf planet and obtained a set of high-resolution images of 3 to 5 m/pixel. These images reveal a variety of morphologic features, including a set of asymmetric crater morphologies as observed earlier in the mission on the asteroid Vesta. We identified 269 craters, which are located between 60° N to 60° S latitude and 197° E to 265° E longitude, and investigated their morphological characteristics using a digital terrain model (DTM). These craters range in diameter from 0.30 to 4.2 km, and exhibit a sharp crater rim on the uphill side and a smooth one on the downhill side. We found that all asymmetric craters are formed on a sloping surface with the majority appearing at slope angles between 5 and 20 degrees. This implies that, as observed on Vesta, the topography is the main cause for these asymmetries.

Item URL in elib:https://elib.dlr.de/131476/
Document Type:Article
Title:Asymmetric Craters on the Dwarf Planet Ceres—Results of Second Extended Mission Data Analysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Krohn, Katrinkatrin.krohn (at) dlr.dehttps://orcid.org/0000-0001-8518-4985
Jaumann, Ralfralf.jaumann (at) dlr.dehttps://orcid.org/0000-0002-9759-6597
Wickhusen, KaiKai.Wickhusen (at) dlr.deUNSPECIFIED
Otto, Katharina A.Katharina.Otto (at) dlr.dehttps://orcid.org/0000-0002-0675-1177
Kersten, ElkeElke.Kersten (at) dlr.deUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Wagner, RolandRoland.Wagner (at) dlr.deUNSPECIFIED
Raymond, Carol A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States.UNSPECIFIED
Russell, Christopher T.Institute of Geophysics, UCLA, Los Angeles, CA, United States.UNSPECIFIED
Date:2019
Journal or Publication Title:Geosciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.3390/geosciences9110475
Page Range:p. 475
Publisher:MDPI (Multidisciplinary Digital Publishing Institute)
ISSN:2076-3263
Status:Published
Keywords:Dawn, Ceres, crater formation, asymmetric craters, subsurface ice
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Asteroids and Comets
Deposited By: Krohn, Dr.rer.nat Katrin
Deposited On:28 Nov 2019 09:45
Last Modified:14 Dec 2019 04:24

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