The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations

dc.contributor.authorHergenrother, Carl
dc.contributor.authorMaleszewski, C K
dc.contributor.authorNolan, M C
dc.contributor.authorLi, J Y
dc.contributor.authorDrouet d’Aubigny, C. Y.
dc.contributor.authorShelly, F C
dc.contributor.authorHowell, E S
dc.contributor.authorKareta, T R
dc.contributor.authorIzawa, M R
dc.contributor.authorBarucci, M. A.
dc.contributor.authorIreland, Trevor
dc.date.accessioned2020-02-17T22:47:34Z
dc.date.available2020-02-17T22:47:34Z
dc.date.issued2019-03-19
dc.date.updated2019-11-25T07:33:38Z
dc.description.abstractDuring its approach to asteroid (101955) Bennu, NASA's Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft surveyed Bennu's immediate environment, photometric properties, and rotation state. Discovery of a dusty environment, a natural satellite, or unexpected asteroid characteristics would have had consequences for the mission's safety and observation strategy. Here we show that spacecraft observations during this period were highly sensitive to satellites (sub-meter scale) but reveal none, although later navigational images indicate that further investigation is needed. We constrain average dust production in September 2018 from Bennu's surface to an upper limit of 150 g s(-1) averaged over 34 min. Bennu's disk-integrated photometric phase function validates measurements from the pre-encounter astronomical campaign. We demonstrate that Bennu's rotation rate is accelerating continuously at 3.63 +/- 0.52 x 10(-6) degrees day(-2), likely due to the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, with evolutionary implications.en_AU
dc.description.sponsorshipThis material is based upon work supported by NASA under Contract NNM10AA11C issued through the New Frontiers Program. This work made use of sbpy (http://sbpy. org), a community-driven Python package for small-body planetary astronomy supported by NASA PDART Grant No. 80NSSC18K0987. A portion of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. M.A.B. and S.F. acknowledge financial support from CNES.en_AU
dc.format.extent10 pagesen_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.urihttp://hdl.handle.net/1885/201731
dc.language.isoen_AUen_AU
dc.publisherNature Research (part of Springer Nature)en_AU
dc.rights© The Author(s) 2019en_AU
dc.rights.licenseThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/en_AU
dc.rights.urihttp://creativecommons.org/ licenses/by/4.0/en_AU
dc.sourceNature Communicationsen_AU
dc.subjectAsteroids, comets and Kuiper belt, Rings and moonsen_AU
dc.titleThe operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observationsen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
dcterms.dateAccepted2019-02-26
local.bibliographicCitation.startpage1291en_AU
local.contributor.affiliationHergenrother, Carl, University of Arizonaen_AU
local.contributor.affiliationMaleszewski, C K, University of Arizonaen_AU
local.contributor.affiliationNolan, M C, University of Arizonaen_AU
local.contributor.affiliationLi, J Y, Planetary Science Instituteen_AU
local.contributor.affiliationDrouet d’Aubigny, C. Y. , University of Arizonaen_AU
local.contributor.affiliationShelly, F C, University of Arizonaen_AU
local.contributor.affiliationHowell, E S, University of Arizonaen_AU
local.contributor.affiliationKareta, T R, University of Arizonaen_AU
local.contributor.affiliationIzawa, M R, Okayama Universityen_AU
local.contributor.affiliationBarucci, M. A., Sorbonne Universitéen_AU
local.contributor.affiliationIreland, Trevor, College of Science, The Australian National Universityen_AU
local.contributor.authoremailrepository.admin@anu.edu.auen_AU
local.contributor.authoruidIreland, Trevor, u8205445en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor040302 - Extraterrestrial Geologyen_AU
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciencesen_AU
local.identifier.ariespublicationu3102795xPUB2098en_AU
local.identifier.citationvolume10en_AU
local.identifier.doi10.1038/s41467-019-09213-xen_AU
local.identifier.essn2041-1723en_AU
local.identifier.thomsonID4.61558E+11
local.identifier.uidSubmittedByu3102795en_AU
local.publisher.urlhttps://www.nature.com/en_AU
local.type.statusPublished Versionen_AU

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