@article{333d70a11f4646e587ab6d5b2fa1afcd,
title = "Spectral characterization of analog samples in anticipation of OSIRIS-REx's arrival at Bennu: A blind test study",
abstract = "We present spectral measurements of a suite of mineral mixtures and meteorites that are possible analogs for asteroid (101955) Bennu, the target asteroid for NASA's Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) mission. The sample suite, which includes anhydrous and hydrated mineral mixtures and a suite of chondritic meteorites (CM, CI, CV, CR, and L5), was chosen to characterize the spectral effects due to varying amounts of aqueous alteration and minor amounts of organic material. Our results demonstrate the utility of mineral mixtures for understanding the mixing behavior of meteoritic materials and identifying spectrally dominant species across the visible to near-infrared (VNIR) and thermal infrared (TIR) spectral ranges. Our measurements demonstrate that, even with subtle signatures in the spectra of chondritic meteorites, we can identify diagnostic features related to the minerals comprising each of the samples. Also, the complementary nature of the two spectral ranges regarding their ability to detect different mixture and meteorite components can be used to characterize analog sample compositions better. However, we observe differences in the VNIR and TIR spectra between the mineral mixtures and the meteorites. These differences likely result from (1) differences in the types and physical disposition of constituents in the mixtures versus in meteorites, (2) missing phases observed in meteorites that we did not add to the mixtures, and (3) albedo differences among the samples. In addition to the initial characterization of the analog samples, we will use these spectral measurements to test phase detection and abundance determination algorithms in anticipation of mapping Bennu's surface properties and selecting a sampling site.",
author = "{Donaldson Hanna}, {K. L.} and Schrader, {D. L.} and Cloutis, {E. A.} and Cody, {G. D.} and King, {A. J.} and McCoy, {T. J.} and Applin, {D. M.} and Mann, {J. P.} and Bowles, {N. E.} and Brucato, {J. R.} and Connolly, {H. C.} and E. Dotto and Keller, {L. P.} and Lim, {L. F.} and Clark, {B. E.} and Hamilton, {V. E.} and C. Lantz and Lauretta, {D. S.} and Russell, {S. S.} and Schofield, {P. F.}",
note = "Funding Information: This manuscript is based upon work supported by the National Aeronautics and Space Administration under Contract NNM10AA11C issued through the New Frontiers Program. The authors would like to thank the Smithsonian Institution, the members of the Meteorite Working Group, Cecilia Satterwhite and Kevin Righter (NASA, Johnson Space Center), Paul Pohwat (Smithsonian), and the Arizona State University Center for Meteorite Studies Meteorite Collection for supplying the samples that were necessary for this work. The Antarctic Search for Meteorites (ANSMET) program recovers US Antarctic meteorite samples, funded by NSF and NASA, which are characterized and curated by the Department of Mineral Sciences of the Smithsonian Institution and Astromaterials Curation Office at NASA Johnson Space Center. Donaldson Hanna thanks the Leverhulme Trust for their support through a postdoctoral fellowship and the UK Space Agency for their support through an Aurora Research Fellowship. Donaldson Hanna, Bowles, King, Russell, and Schofield thank the UK Science and Technology Facilities Council for supporting the facilities within the University of Oxford's Planetary Spectroscopy Facility and the Natural History Museum, London. Cloutis thanks Paul Mann for acquiring the reflectance spectra of the mixtures and meteorites used in this study, and Drs. Carle Pieters and Takahiro Hiroi of the NASA-supported Reflectance Experiment Laboratory (RELAB) Facility at Brown University for acquiring the spectra of the pure mineral phases. Cloutis also thanks the Canadian Space Agency, the Canada Foundation for Innovation, the Manitoba Research Innovations Fund, the Natural Sciences and Engineering Research Council of Canada, and the University of Winnipeg for supporting the establishment and operation of the University of Winnipeg's Planetary Spectrophotometer Facility. Funding Information: This manuscript is based upon work supported by the National Aeronautics and Space Administration under Contract NNM10AA11C issued through the New Frontiers Program. The authors would like to thank the Smithsonian Institution, the members of the Meteorite Working Group, Cecilia Satterwhite and Kevin Righter (NASA, Johnson Space Center), Paul Pohwat (Smithsonian), and the Arizona State University Center for Meteorite Studies Meteorite Collection for supplying the samples that were necessary for this work. The Antarctic Search for Meteorites (ANSMET) program recovers US Antarctic meteorite samples, funded by NSF and NASA, which are characterized and curated by the Department of Mineral Sciences of the Smithsonian Institution and Astromaterials Curation Office at NASA Johnson Space Center. Donaldson Hanna thanks the Leverhulme Trust for their support through a postdoctoral fellowship and the UK Space Agency for their support through an Aurora Research Fellowship. Donaldson Hanna, Bowles, King, Russell, and Schofield thank the UK Science and Technology Facilities Council for supporting the facilities within the University of Oxford's Planetary Spectroscopy Facility and the Natural History Museum, London. Cloutis thanks Paul Mann for acquiring the reflectance spectra of the mixtures and meteorites used in this study, and Drs. Carle Pieters and Takahiro Hiroi of the NASA-supported Reflectance Experiment Laboratory (RELAB) Facility at Brown University for acquiring the spectra of the pure mineral phases. Cloutis also thanks the Canadian Space Agency, the Canada Foundation for Innovation, the Manitoba Research Innovations Fund, the Natural Sciences and Engineering Research Council of Canada, and the University of Winnipeg for supporting the establishment and operation of the University of Winnipeg's Planetary Spectrophotometer Facility. Publisher Copyright: {\textcopyright} 2018",
year = "2019",
month = feb,
doi = "10.1016/j.icarus.2018.10.018",
language = "English (US)",
volume = "319",
pages = "701--723",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
}