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Attitude reconstruction of MASCOT lander during its descent and stay on asteroid (162173) Ryugu

Garnier, R. and Torres, Alex and Martin, T. and Lorda, L. and Canalias, E. and Moussi-Soffys, A. and Biele, Jens and Scholten, Frank and Jaumann, R and Ho, Tra-Mi and Mimasu, Y. and Tsuda, T. (2021) Attitude reconstruction of MASCOT lander during its descent and stay on asteroid (162173) Ryugu. Planetary and Space Science, 195, p. 105150. Elsevier. doi: 10.1016/j.pss.2020.105150. ISSN 0032-0633.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0032063320303639

Abstract

Hayabusa-2, a JAXA mission, reached C-type asteroid (162173) Ryugu in June 2018. Hayabusa2 carried MASCOT (Ho et al., 2016), a small lander developed by DLR and CNES. The goal of MASCOT was to perform in situ measurements on the surface of the asteroid by means of its four scientific instruments, substantially contributing in this way to the overall scientific return of Hayabusa2 mission. MASCOT landing occurred the October 3, 2018. After its release by Hayabusa2 spacecraft, the MASCOT lander experienced 17 ​min of descent and bounces. Then after stabilization it collected measurements during 17 ​h, visiting three slightly different sites. A comprehensive knowledge of MASCOT’s attitudes on the various moment of its mission is essential for the understanding of the science data gathered by the scout. CNES flight dynamics team was involved in the reconstruction of MASCOT landing trajectory and attitude. This paper presents the attitude reconstruction of MASCOT during its descent and on its second landing site. The reconstruction used as inputs the housekeeping data generated by the 6 Photo Electric Cells of MASCOT, as well as the images acquired by Hayabusa2 ONC camera and the MASCAM camera. The assessment was very complex but we determined the attitude with a mean accuracy around 10° during descent and 8° when MASCOT was stable once the second landing site was successfully reached. Nevertheless, for the other phases - bounces, first landing site and last landing site-the lander attitude is still undetermined.

Item URL in elib:https://elib.dlr.de/142594/
Document Type:Article
Title:Attitude reconstruction of MASCOT lander during its descent and stay on asteroid (162173) Ryugu
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Garnier, R.CS-SI Communication & Systems, ToulouseUNSPECIFIED
Torres, AlexCNES, ToulouseUNSPECIFIED
Martin, T.CNES ToulouseUNSPECIFIED
Lorda, L.CNES, ToulouseUNSPECIFIED
Canalias, E.CNES ToulouseUNSPECIFIED
Moussi-Soffys, A.CNES ToulouseUNSPECIFIED
Biele, JensJens.Biele (at) dlr.deUNSPECIFIED
Scholten, FrankFrank.Scholten (at) dlr.deUNSPECIFIED
Jaumann, Rralf.jaumann (at) dlr.deUNSPECIFIED
Ho, Tra-MiTra-Mi.Ho (at) dlr.deUNSPECIFIED
Mimasu, Y.ISAS/JAXA JapanUNSPECIFIED
Tsuda, T.ISAS/JAXA JapanUNSPECIFIED
Date:2021
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:195
DOI :10.1016/j.pss.2020.105150
Page Range:p. 105150
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:MASCOT lander, asteroid Ryugu
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 , Bremen , Köln-Porz
Institutes and Institutions:Space Operations and Astronaut Training > User center for space experiments (MUSC)
Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Geology
Institute of Space Systems > Systems Engineering and Project Office
Deposited By: Herrmann, Astrid
Deposited On:03 Jun 2021 07:37
Last Modified:03 Jun 2021 07:37

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