Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations
Abstract Asteroids 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...
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Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2018-03, Vol.475 (1), p.614-623 |
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creator | Le Corre, Lucille Sanchez, Juan A Reddy, Vishnu Takir, Driss Cloutis, Edward A Thirouin, Audrey Becker, Kris J Li, Jian-Yang Sugita, Seiji Tatsumi, Eri |
description | Abstract
Asteroids 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. |
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Asteroids 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.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stx3236</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Albedo ; Asteroid missions ; Asteroids ; Carbonaceous chondrites ; Chondrites ; Computation ; Ground-based observation ; Infrared telescopes ; Japanese spacecraft ; Mars ; Mars missions ; Mars surface ; Meteoritic composition ; Meteors & meteorites ; Photometry ; Sample return missions ; Spacecraft ; Spectral analysis</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2018-03, Vol.475 (1), p.614-623</ispartof><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 2018</rights><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c403t-6ed2a90e19280ee717c78ba69d1f486c0e92c655cea55b7ce2d2831af007c0be3</citedby><cites>FETCH-LOGICAL-c403t-6ed2a90e19280ee717c78ba69d1f486c0e92c655cea55b7ce2d2831af007c0be3</cites><orcidid>0000-0003-0349-7932</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stx3236$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Le Corre, Lucille</creatorcontrib><creatorcontrib>Sanchez, Juan A</creatorcontrib><creatorcontrib>Reddy, Vishnu</creatorcontrib><creatorcontrib>Takir, Driss</creatorcontrib><creatorcontrib>Cloutis, Edward A</creatorcontrib><creatorcontrib>Thirouin, Audrey</creatorcontrib><creatorcontrib>Becker, Kris J</creatorcontrib><creatorcontrib>Li, Jian-Yang</creatorcontrib><creatorcontrib>Sugita, Seiji</creatorcontrib><creatorcontrib>Tatsumi, Eri</creatorcontrib><title>Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations</title><title>Monthly notices of the Royal Astronomical Society</title><description>Abstract
Asteroids 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.</description><subject>Albedo</subject><subject>Asteroid missions</subject><subject>Asteroids</subject><subject>Carbonaceous chondrites</subject><subject>Chondrites</subject><subject>Computation</subject><subject>Ground-based observation</subject><subject>Infrared telescopes</subject><subject>Japanese spacecraft</subject><subject>Mars</subject><subject>Mars missions</subject><subject>Mars surface</subject><subject>Meteoritic composition</subject><subject>Meteors & meteorites</subject><subject>Photometry</subject><subject>Sample return missions</subject><subject>Spacecraft</subject><subject>Spectral analysis</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFkc1Lw0AQxRdRsH4cvS948RK7H80m8SZFrVAQRM9hspnUlXY37mzA-tf4pxpb756Gmfeb9w6PsQsprqWo9HTjI9CU0qdW2hywidQmz1RlzCGbCKHzrCykPGYnRO9CiJlWZsK-H2IYfJs1QNhy-wYRbMLoviC54Hno-AK20AwEim8c0e8xQVxh4kAjGFzLpVGy0Px5O6yGG26DpxTBeedX44vHCOuwchbWo7TpA7mds_O8j9iPebu1C5FTDxZthC7x0ONeoDN21MGa8PxvnrLX-7uX-SJbPj08zm-XmZ0JnTKDrYJKoKxUKRALWdiibMBUrexmpbECK2VNnluEPG8Ki6pVpZbQCVFY0aA-ZZd73z6GjwEp1e9hiH6MrJVUwsjcKD1S2Z6yMRBF7Oo-ug3EbS1F_VtCvSuh_ith5K_2fBj6f9AfehSOfA</recordid><startdate>20180321</startdate><enddate>20180321</enddate><creator>Le Corre, Lucille</creator><creator>Sanchez, Juan A</creator><creator>Reddy, Vishnu</creator><creator>Takir, Driss</creator><creator>Cloutis, Edward A</creator><creator>Thirouin, Audrey</creator><creator>Becker, Kris J</creator><creator>Li, Jian-Yang</creator><creator>Sugita, Seiji</creator><creator>Tatsumi, Eri</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-0349-7932</orcidid></search><sort><creationdate>20180321</creationdate><title>Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations</title><author>Le Corre, Lucille ; Sanchez, Juan A ; Reddy, Vishnu ; Takir, Driss ; Cloutis, Edward A ; Thirouin, Audrey ; Becker, Kris J ; Li, Jian-Yang ; Sugita, Seiji ; Tatsumi, Eri</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c403t-6ed2a90e19280ee717c78ba69d1f486c0e92c655cea55b7ce2d2831af007c0be3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Albedo</topic><topic>Asteroid missions</topic><topic>Asteroids</topic><topic>Carbonaceous chondrites</topic><topic>Chondrites</topic><topic>Computation</topic><topic>Ground-based observation</topic><topic>Infrared telescopes</topic><topic>Japanese spacecraft</topic><topic>Mars</topic><topic>Mars missions</topic><topic>Mars surface</topic><topic>Meteoritic composition</topic><topic>Meteors & meteorites</topic><topic>Photometry</topic><topic>Sample return missions</topic><topic>Spacecraft</topic><topic>Spectral analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Le Corre, Lucille</creatorcontrib><creatorcontrib>Sanchez, Juan A</creatorcontrib><creatorcontrib>Reddy, Vishnu</creatorcontrib><creatorcontrib>Takir, Driss</creatorcontrib><creatorcontrib>Cloutis, Edward A</creatorcontrib><creatorcontrib>Thirouin, Audrey</creatorcontrib><creatorcontrib>Becker, Kris J</creatorcontrib><creatorcontrib>Li, Jian-Yang</creatorcontrib><creatorcontrib>Sugita, Seiji</creatorcontrib><creatorcontrib>Tatsumi, Eri</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Le Corre, Lucille</au><au>Sanchez, Juan A</au><au>Reddy, Vishnu</au><au>Takir, Driss</au><au>Cloutis, Edward A</au><au>Thirouin, Audrey</au><au>Becker, Kris J</au><au>Li, Jian-Yang</au><au>Sugita, Seiji</au><au>Tatsumi, Eri</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2018-03-21</date><risdate>2018</risdate><volume>475</volume><issue>1</issue><spage>614</spage><epage>623</epage><pages>614-623</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
Asteroids 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.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stx3236</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-0349-7932</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Albedo Asteroid missions Asteroids Carbonaceous chondrites Chondrites Computation Ground-based observation Infrared telescopes Japanese spacecraft Mars Mars missions Mars surface Meteoritic composition Meteors & meteorites Photometry Sample return missions Spacecraft Spectral analysis |
title | Ground-based characterization of Hayabusa2 mission target asteroid 162173 Ryugu: constraining mineralogical composition in preparation for spacecraft operations |
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