elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Constraints for Ryugu's mineralogical composition by estimating average grain density using rock porositites, bulk density and an estimate for the macroporosity

Biele, Jens and Michel, Patrick and Sugita, S. and Grott, Matthias and Sakatani, N. and Neumann, Wladimir and Kameda, Shingo and Michikami, Tatsuhiro and Honda, C. (2019) Constraints for Ryugu's mineralogical composition by estimating average grain density using rock porositites, bulk density and an estimate for the macroporosity. EGU Genral Assemply 2019, 07. - 12. April 2019, Wien, Österreich.

Full text not available from this repository.

Abstract

The macroporosity of Ryugu - seen as a rubble pile - can be estimated, following semi-empirical mixing models which depend on size distribution of the boulders constituting Ryugu, and their angularity and sphericity. We use this estimate with the measured bulk density of Ryugu and the estimates of porosity of constituent rocks by the radiometers TIR and MARA to constrain the average grain density, which is the quantity with the largest remaining uncertainty and linked to composition. Results are obtained by a constrained weighted least-squares optimization and and result probability distributions by Monte Carlo calculations. Low grain densities, like for CI (2.27 g/cm3 after Consolmagno et al, 2008) are very unlikely

Item URL in elib:https://elib.dlr.de/127623/
Document Type:Conference or Workshop Item (Speech)
Title:Constraints for Ryugu's mineralogical composition by estimating average grain density using rock porositites, bulk density and an estimate for the macroporosity
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Biele, JensJens.Biele (at) dlr.deUNSPECIFIED
Michel, PatrickObservatoire de la Côte d'Azur, NiceUNSPECIFIED
Sugita, S.University of Tokyo, Tokyo, JapanUNSPECIFIED
Grott, MatthiasMatthias.Grott (at) dlr.deUNSPECIFIED
Sakatani, N.jaxa-isas, sagamihara, japanUNSPECIFIED
Neumann, WladimirWladimir.Neumann (at) dlr.deUNSPECIFIED
Kameda, ShingoDep. of Physics, Rikkyo University, TokyoUNSPECIFIED
Michikami, TatsuhiroKindai University, Hiroshima, JapanUNSPECIFIED
Honda, C.Univ Aizu, Res Ctr Adv Informat Sci & Technol, Aizu Wakamatsu, Fukushima, JapanUNSPECIFIED
Date:7 April 2019
Refereed publication:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Ryugu, mineralogical
Event Title:EGU Genral Assemply 2019
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:07. - 12. April 2019
Organizer:EGU
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):Vorhaben asteroids and comets
Location: Berlin-Adlershof , Köln-Porz
Institutes and Institutions:Space Operations and Astronaut Training > User center for space experiments (MUSC)
Institute of Planetary Research > Planetary Physics
Deposited By: Herrmann, Astrid
Deposited On:29 May 2019 15:38
Last Modified:29 May 2019 15:38

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.