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dc.contributor.authorLe Corre, Lucille
dc.contributor.authorSanchez, Juan A
dc.contributor.authorReddy, Vishnu
dc.contributor.authorTakir, Driss
dc.contributor.authorCloutis, Edward A
dc.contributor.authorThirouin, Audrey
dc.contributor.authorBecker, Kris J
dc.contributor.authorLi, Jian-Yang
dc.contributor.authorSugita, Seiji
dc.contributor.authorTatsumi, Eri
dc.date.accessioned2018-05-02T19:03:42Z
dc.date.available2018-05-02T19:03:42Z
dc.date.issued2018-03-21
dc.identifier.citationLucille Le Corre, Juan A Sanchez, Vishnu Reddy, Driss Takir, Edward A Cloutis, Audrey Thirouin, Kris J Becker, Jian-Yang Li, Seiji Sugita, Eri Tatsumi; Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations, Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 1, 21 March 2018, Pages 614–623, https://doi.org/10.1093/mnras/stx3236en_US
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.doi10.1093/mnras/stx3236
dc.identifier.urihttp://hdl.handle.net/10150/627557
dc.description.abstractAsteroids that are targets of spacecraft missions are interesting because they present us with an opportunity to validate ground-based spectral observations. One such object is near-Earth asteroid (NEA) (162173) Ryugu, which is the target of the Japanese Space Agency's (JAXA) Hayabusa2 sample return mission. We observed Ryugu using the 3-m NASA Infrared Telescope Facility on Mauna Kea, Hawaii, on 2016 July 13 to constrain the object's surface composition, meteorite analogues, and link to other asteroids in the main belt and NEA populations. We also modelled its photometric properties using archival data. Using the Lommel-Seeliger model we computed the predicted flux for Ryugu at a wide range of viewing geometries as well as albedo quantities such as geometric albedo, phase integral, and spherical Bond albedo. Our computed albedo quantities are consistent with results from Ishiguro et al. Our spectral analysis has found a near-perfect match between our spectrum of Ryugu and those of NEA (85275) 1994 LY and Mars-crossing asteroid (316720) 1998 BE7, suggesting that their surface regoliths have similar composition. We compared Ryugu's spectrum with that of main belt asteroid (302) Clarissa, the largest asteroid in the Clarissa asteroid family, suggested as a possible source of Ryugu by Campins et al. We found that the spectrum of Clarissa shows significant differences with our spectrum of Ryugu, but it is similar to the spectrum obtained by Moskovitz et al. The best possible meteorite analogues for our spectrum of Ryugu are two CM2 carbonaceous chondrites, Mighei and ALH83100.en_US
dc.description.sponsorshipNASA Hayabusa2 Participating Scientist grant [NNX16AK77G]; NASA Near-Earth Object Observations Program [NNX14AL06G, NNX17AJ19G]; Canadian Space Agency; Natural Sciences and Engineering Research Council of Canada; Canada Foundation for Innovation; Manitoba Research Innovation Fund; University of Winnipeg; NASA Hayabusa2 Participating Scientists grants [NNX17AL02G]; NASA [NNH14CK55B]en_US
dc.language.isoenen_US
dc.publisherOXFORD UNIV PRESSen_US
dc.relation.urlhttps://academic.oup.com/mnras/article/475/1/614/4769653en_US
dc.rights© 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Societyen_US
dc.subjecttechniques: spectroscopicen_US
dc.subjectmeteorites, meteors, meteoroidsen_US
dc.subjectminor planets, asteroids: generalen_US
dc.subjectminor planets, asteroids: individual: Ryuguen_US
dc.subjectinfrared: generalen_US
dc.titleGround-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operationsen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleMonthly Notices of the Royal Astronomical Society
dc.source.volume475
dc.source.issue1
dc.source.beginpage614
dc.source.endpage623
refterms.dateFOA2018-05-02T19:03:43Z


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