{"id":21618,"date":"2020-03-05T17:15:22","date_gmt":"2020-03-05T16:15:22","guid":{"rendered":"http:\/\/karmaka.de\/?p=21618"},"modified":"2020-03-05T17:16:07","modified_gmt":"2020-03-05T16:16:07","slug":"disk-resolved-photometric-modeling-and-properties-of-asteroid-101955-bennu","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21618","title":{"rendered":"Disk-resolved photometric modeling and properties of asteroid (101955) Bennu<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>D.R. Golish, D.N. DellaGiustina, J.-Y. Li, B.E. Clark, X.-D.Zoub, P.H.Smith, J.L.Rizos, P.H. Hasselmann, C.A.Bennett, S.Fornasier, R.-L.Ballouz, C. Drouet d&#8217;Aubigny, B.Rizk, M.G.Daly, O.S. Barnouin, L.Philpott, M.M.Al Asad, J.A.Seabrook, D.S.Laurett<\/p>\n\n\n\n<p>Icarus<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0019103520301159\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<p>\u2022    The OSIRIS-REx spacecraft globally imaged asteroid Bennu.<br>\n\u2022    Bennu&#8217;s extremely rough terrain poses challenges to photometric modeling.<br>\n\u2022    The resolution of the shape model affects photometric modeling and correction accuracy.<br>\n\u2022    Bennu&#8217;s surface shows evidence of moderate phase reddening.<br>\n\u2022    A shallow, broad opposition surge is consistent with Bennu&#8217;s dark surface.&#8221;<\/p>\n\n\n\n<p class=\"justify-text\">&#8220;OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security\u2013Regolith Explorer) is a NASA mission to return a sample of asteroid (101955) Bennu. Photometric modeling of Bennu&#8217;s surface is a key element of both sample site characterization and our broader scientific understanding of the asteroid. Bennu&#8217;s heterogeneous surface presents substantial variation in reflectance and produces a scattered dataset that poses a challenge to photometric modeling. We show that the resolution of the shape model with which we calculate photometric angles strongly affects the accuracy of the analysis, as well as the efficacy of subsequent photometric corrections. We use global imaging data to fit empirical photometric models of the surface. These models represent the average behavior of Bennu&#8217;s surface and can be used beyond this work to photometrically correct panchromatic and color basemaps of Bennu and perform albedo analyses of individual features on Bennu&#8217;s surface. Bennu&#8217;s global photometry reveals a moderate opposition effect and detectable phase reddening, both of which suggest a macroscopically rough surface, which is confirmed by centimeter-scale images of the asteroid.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D.R. Golish, D.N. DellaGiustina, J.-Y. Li, B.E. Clark, X.-D.Zoub, P.H.Smith, J.L.Rizos, P.H. Hasselmann, C.A.Bennett, S.Fornasier, R.-L.Ballouz, C. Drouet d&#8217;Aubigny, B.Rizk, M.G.Daly, O.S. Barnouin, L.Philpott, M.M.Al Asad, J.A.Seabrook, D.S.Laurett Icarus LINK (OPEN ACCESS) &#8220;Highlights \u2022 The&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,552],"tags":[1854,1771,553,1886],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21618"}],"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=21618"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21618\/revisions"}],"predecessor-version":[{"id":21620,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21618\/revisions\/21620"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}