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Spectral and Petrographic Properties of Inclusions in Carbonaceous Chondrites and Comparison with In Situ Images from Asteroid Ryugu

Otto, Katharina A. and Schröder, Stefan and Scharf, Hannah and Greshake, A. and Schmitz, Nicole and Trauthan, Frank and Pieth, Susanne and Stephan, Katrin and Ho, Tra-Mi and Jaumann, R. and Koncz, Alexander and Michalik, Tanja and Yabuta, H. (2021) Spectral and Petrographic Properties of Inclusions in Carbonaceous Chondrites and Comparison with In Situ Images from Asteroid Ryugu. The Planetary Science Journal, 2 (5), p. 188. Institute of Physics (IOP) Publishing. doi: 10.3847/PSJ/ac034b. ISSN 2632-3338.

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Official URL: https://iopscience.iop.org/article/10.3847/PSJ/ac034b


We imaged a set of carbonaceous chondrites from the CM2, CO3, CV3, and CK4 groups using the qualification model of MasCam, the camera on board the asteroid lander MASCOT, which touched down on asteroid Ryugu in 2018 October. A CI1 meteorite was also imaged but excluded from the analysis due to prominent terrestrial weathering. Following the methods used to image the rock on Ryugu, we placed a total of 14 meteorites approximately 20 cm in front of the camera to achieve a spatial resolution of about 0.2 mm per pixel and illuminated the samples with onboard light-emitting diodes of four different colors in the visible wavelength range. We mapped bright and dark inclusions within the meteorites and derived the inclusion brightness relative to the matrix in the red light, the relative spectral slope of each inclusion, the inclusion size frequency distribution and the matrix volume abundance. We find that the meteorite groups overlap within these parameters, but individual samples, as well as individual inclusions, can have deviating values. Terrestrial weathering appears to have no systematic influence on these parameters. Relating our analysis to the inclusions found in the rock on Ryugu, we find that the spectral parameters of Ryugu's inclusions fit well in the parameter space of the carbonaceous chondrites. Compared with the most common types of carbonaceous chondrites, Ryugu's rock has larger inclusions (mean diameter: 0.63 ± 0.91 mm) and a higher upper limit to the matrix abundance (92.4 vol%).

Item URL in elib:https://elib.dlr.de/148003/
Document Type:Article
Title:Spectral and Petrographic Properties of Inclusions in Carbonaceous Chondrites and Comparison with In Situ Images from Asteroid Ryugu
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Otto, Katharina A.Katharina.Otto (at) dlr.dehttps://orcid.org/0000-0002-0675-1177
Schröder, StefanStefanus.Schroeder (at) dlr.dehttps://orcid.org/0000-0003-0323-8324
Scharf, HannahInstitut für Planetenforschung, DLR Berlin; TU Bergakademie Freiberg, GermanyUNSPECIFIED
Greshake, A.Museum für Naturkunde, Humboldt-Universität zu Berlin, D 10099 Berlin, GermanyUNSPECIFIED
Schmitz, NicoleNicole.Schmitz (at) dlr.dehttps://orcid.org/0000-0001-6481-6189
Trauthan, FrankFrank.Trauthan (at) dlr.deUNSPECIFIED
Pieth, SusanneSusanne.Pieth (at) dlr.deUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Ho, Tra-MiTra-Mi.Ho (at) dlr.deUNSPECIFIED
Koncz, AlexanderAlexander.Koncz (at) dlr.deUNSPECIFIED
Michalik, TanjaTanja.Michalik (at) dlr.dehttps://orcid.org/0000-0002-9556-1737
Yabuta, H.Hiroshima University, Higashi-Hiroshima 739-8526, JapanUNSPECIFIED
Date:9 September 2021
Journal or Publication Title:The Planetary Science Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
DOI :10.3847/PSJ/ac034b
Page Range:p. 188
Publisher:Institute of Physics (IOP) Publishing
Keywords:Meteorites; Carbonaceous chondrites; Asteroids; Asteroid surfaces; Spectroscopy; Planetary science; Landers
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project MASCOT - Science
Location: Berlin-Adlershof , Köln-Porz
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Institute of Planetary Research > Planetary Sensor Systems
Institute of Planetary Research > Institutsplanung / Zentrale Aufgaben PF
Institute of Space Systems > Systems Engineering and Project Office
Deposited By: Schmitz, Nicole
Deposited On:06 Jan 2022 08:39
Last Modified:06 Jan 2022 08:39

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