{"id":18169,"date":"2019-03-19T19:27:35","date_gmt":"2019-03-19T18:27:35","guid":{"rendered":"http:\/\/karmaka.de\/?p=18169"},"modified":"2019-03-19T19:31:24","modified_gmt":"2019-03-19T18:31:24","slug":"the-surface-composition-of-asteroid-162173-ryugu-from-hayabusa2-near-infrared-spectroscopy","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=18169","title":{"rendered":"The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>K. Kitazato,R. E. Milliken,T. Iwata,M. Abe,M. Ohtake,S. Matsuura,T. Arai,Y. Nakauchi,T. Nakamura,M. Matsuoka,H. Senshu,N. Hirata,T. Hiroi,C. Pilorget,R. Brunetto,F. Poulet,L. Riu,J.-P. Bibring,D. Takir,D. L. Domingue,F. Vilas,M. A. Barucci,D. Perna,E. Palomba,A. Galiano,K. Tsumura,T. Osawa,M. Komatsu,A. Nakato,T. Arai,N. Takato,T. Matsunaga,Y. Takagi,K. Matsumoto,T. Kouyama,Y. Yokota,E. Tatsumi,N. Sakatani,Y. Yamamoto,T. Okada,S. Sugita,R. Honda,T. Morota,S. Kameda,H. Sawada,C. Honda,M. Yamada,H. Suzuki,K. Yoshioka,M. Hayakawa,K. Ogawa,Y. Cho,K. Shirai,Y. Shimaki,N. Hirata,A. Yamaguchi,N. Ogawa,F. Terui,T. Yamaguchi,Y. Takei,T. Saiki,S. Nakazawa,S. Tanaka,M. Yoshikawa,S. Watanabe,Y. Tsuda<\/p>\n\n\n\n<p>Science  19 Mar 2019:<br>\neaav7432<br>\nDOI: 10.1126\/science.aav7432 <\/p>\n\n\n\n<p><a href=\"http:\/\/science.sciencemag.org\/content\/early\/2019\/03\/18\/science.aav7432\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br>\n<a href=\"http:\/\/science.sciencemag.org\/content\/sci\/early\/2019\/03\/18\/science.aav7432.full.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The near-Earth asteroid 162173 Ryugu, the target of Hayabusa2 sample return mission, is thought to be a primitive carbonaceous object. We report reflectance spectra of Ryugu\u2019s surface acquired with the Near Infrared Spectrometer (NIRS3) on Hayabusa2, to provide direct measurements of the surface composition and geological context for the returned samples. A weak, narrow absorption feature centered at 2.72 \u03bcm was detected across the entire observed surface, indicating that hydroxyl (OH)-bearing minerals are ubiquitous there. The intensity of the OH feature and low albedo are similar to thermally- and\/or shock-metamorphosed carbonaceous chondrite meteorites. There are few variations in the OH-band position, consistent with Ryugu being a compositionally homogeneous rubble-pile object, generated from impact fragments of an undifferentiated aqueously altered parent body.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K. Kitazato,R. E. Milliken,T. Iwata,M. Abe,M. Ohtake,S. Matsuura,T. Arai,Y. Nakauchi,T. Nakamura,M. Matsuoka,H. Senshu,N. Hirata,T. Hiroi,C. Pilorget,R. Brunetto,F. Poulet,L. Riu,J.-P. Bibring,D. Takir,D. L. Domingue,F. Vilas,M. A. Barucci,D. Perna,E. Palomba,A. Galiano,K. Tsumura,T. Osawa,M. Komatsu,A. Nakato,T. Arai,N. Takato,T&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,77,2350,9,4909,10,18,4906,2243,181,62],"tags":[108,1842,3274,3273,4908,1054,2244,734,4669,1479,2139,4684,1843],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18169"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18169"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18169\/revisions"}],"predecessor-version":[{"id":18170,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18169\/revisions\/18170"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}