The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations
C. W. HergenrotherLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA. [email protected]C. MaleszewskiLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAM. C. NolanLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAJian‐Yang LiPlanetary Science Institute, Tucson, AZ, USAC. Drouet d’AubignyLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAF. C. ShellyLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAE. S. HowellLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USATheodore KaretaLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAM. R. M. IzawaInstitute for Planetary Materials, Okayama University-Misasa, Misasa, Tottori, JapanM. A. BarucciSorbonne UniversitéE. B. BierhausLockheed Martin Space, Littleton, CO, USAH. CampinsDepartment of Physics, University of Central Florida, Orlando, FL, USASteven R. ChesleyJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAB. E. ClarkDepartment of Physics and Astronomy, Ithaca College, Ithaca, NY, USAE. ChristensenLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAD. N. DellaGiustinaLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAS. FornasierLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, Meudon, FranceD. R. GolishLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAChristine HartzellDepartment of Aerospace Engineering, University of Maryland, College Park, MD, USAB. RizkLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USADaniel J. ScheeresSmead Department of Aerospace Engineering, University of Colorado, Boulder, CO, USAPeter H. SmithLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAXiao‐Duan ZouPlanetary Science Institute, Tucson, AZ, USAD. S. LaurettaLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAThe OSIRIS-REx TeamAerospace Corporation, Chantilly, VA, USAD. E. HighsmithAerospace Corporation, Chantilly, VA, USAJeffrey L. SmallAerospace Corporation, Chantilly, VA, USADavid VokrouhlickýAstronomical Institute, Charles University, Prague, Czech RepublicN. E. BowlesAtmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UKEric BrownAtmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UKK. L. Donaldson HannaAtmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UKT. WarrenAtmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UKC. BrunetCanadian Space Agency, Saint-Hubert, Quebec, CanadaR. A. ChicoineCanadian Space Agency, Saint-Hubert, Quebec, CanadaSerge DesjardinsCanadian Space Agency, Saint-Hubert, Quebec, CanadaD. GaudreauCanadian Space Agency, Saint-Hubert, Quebec, CanadaT. HaltiginCanadian Space Agency, Saint-Hubert, Quebec, CanadaS. Millington-VelozaCanadian Space Agency, Saint-Hubert, Quebec, CanadaA. RubiCanadian Space Agency, Saint-Hubert, Quebec, CanadaJosé C. AponteCatholic University of America, Washington, DC, USANicolas GoriusCatholic University of America, Washington, DC, USAAllen LunsfordCatholic University of America, Washington, DC, USAB. AllenCenter for Astrophysics, Harvard University, Cambridge, MA, USAJ. E. GrindlayCenter for Astrophysics, Harvard University, Cambridge, MA, USADavid Joseph GuevelCenter for Astrophysics, Harvard University, Cambridge, MA, USAD. HoakCenter for Astrophysics, Harvard University, Cambridge, MA, USAJaesub HongCenter for Astrophysics, Harvard University, Cambridge, MA, USAD. L. SchraderCenter for Meteorite Studies, Arizona State University, Tempe, AZ, USAJ. BayronCity University of New York, New York, NY, USAOleksiy GolubovColorado Center for Astrodynamics Research, University of Colorado, Boulder, CO, USAPaul SánchezColorado Center for Astrodynamics Research, University of Colorado, Boulder, CO, USAJ. StrombergCommonwealth Scientific and Industrial Research Organisation (CSIRO), Canberra, Australian Capital Territory, AustraliaMasatoshi HirabayashiDepartment of Aerospace Engineering, Auburn University, Auburn, AL, USAS. OliverDepartment of Astronomy and Steward Observatory, University of Arizona, Tuscon, AZ, USAM. RasconDepartment of Astronomy and Steward Observatory, University of Arizona, Tuscon, AZ, USAA. HarchDepartment of Astronomy, Cornell University, Ithaca, NY, USAJ. JosephDepartment of Astronomy, Cornell University, Ithaca, NY, USAS. W. SquyresDepartment of Astronomy, Cornell University, Ithaca, NY, USAD. C. RichardsonDepartment of Astronomy, University of Maryland, College Park, MD, USAJoshua P. EmeryDepartment of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN, USAL. McGrawDepartment of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN, USAR. R. GhentDepartment of Earth Sciences, University of Toronto, Toronto, Ontario, CanadaRichard P. BinzelDepartment of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USAM. Al AsadDepartment of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, CanadaC. L. JohnsonDepartment of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, CanadaL. PhilpottDepartment of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, CanadaH. C. M. SusorneyDepartment of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, CanadaE. A. CloutisDepartment of Geography, University of Winnipeg, Winnipeg, Manitoba, CanadaR. D. HannaDepartment of Geological Sciences, Jackson School of Geosciences, University of Texas, Austin, TX, USAH. C. ConnollyDepartment of Geology, Rowan University, Glassboro, NJ, USAF. CiceriDepartment of Geoscience, University of Calgary, Calgary, Alberta, CanadaA. R. HildebrandDepartment of Geoscience, University of Calgary, Calgary, Alberta, CanadaE.-M. IbrahimDepartment of Geoscience, University of Calgary, Calgary, Alberta, CanadaL. B. BreitenfeldDepartment of Geosciences, Stony Brook University, Stony Brook, NY, USAT. D. GlotchDepartment of Geosciences, Stony Brook University, Stony Brook, NY, USAA. D. RogersDepartment of Geosciences, Stony Brook University, Stony Brook, NY, USASalvatore FerroneDepartment of Physics and Astronomy, Ithaca College, Ithaca, NY, USACristina A. ThomasDepartment of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ, USAH. CampinsDepartment of Physics, University of Central Florida, Orlando, FL, USAY. R. FernándezDepartment of Physics, University of Central Florida, Orlando, FL, USAW. ChangEdge Space Systems, Greenbelt, MD, USAA. CheuvrontGeneral Dynamics C4 Systems, Denver, CO, USAD. TrangHawaiʻi Institute of Geophysics and Planetology, University of Hawaiʻi at Mānoa, Honolulu, HI, USAShogo TachibanaHokkaido University, Sapporo, JapanHisayoshi YurimotoHokkaido University, Sapporo, JapanJ. R. BrucatoINAF–Astrophysical Observatory of Arcetri, Florence, ItalyGiovanni PoggialiINAF–Astrophysical Observatory of Arcetri, Florence, ItalyM. PajolaINAF–Osservatorio Astronomico di Padova, Padova, ItalyE. DottoINAF–Osservatorio Astronomico di Roma, Rome, ItalyE. Mazzotta EpifaniINAF–Osservatorio Astronomico di Roma, Rome, ItalyM. K. CrombieIndigo Information Services, Tucson, AZ, USAC. LantzInstitut d’Astrophysique Spatiale, CNRS/Université Paris Sud, Orsay, FranceJ. de LeónInstituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, SpainJ. LicandroInstituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, SpainJ. L. Rizos GarciaInstituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, SpainS. J. ClemettJacobs Technology, Houston, TX, USA
2019en
ABI
Аннотация
Abstract During 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 × 10 –6 degrees day –2 , likely due to the Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect, with evolutionary implications.
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