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The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations.
Hergenrother, C W; Maleszewski, C K; Nolan, M C; Li, J-Y; Drouet d'Aubigny, C Y; Shelly, F C; Howell, E S; Kareta, T R; Izawa, M R M; Barucci, M A; Bierhaus, E B; Campins, H; Chesley, S R; Clark, B E; Christensen, E J; DellaGiustina, D N; Fornasier, S; Golish, D R; Hartzell, C M; Rizk, B; Scheeres, D J; Smith, P H; Zou, X-D; Lauretta, D S.
Afiliación
  • Hergenrother CW; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA. chergen@orex.lpl.arizona.edu.
  • Maleszewski CK; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Nolan MC; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Li JY; Planetary Science Institute, Tucson, AZ, USA.
  • Drouet d'Aubigny CY; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Shelly FC; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Howell ES; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Kareta TR; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Izawa MRM; Institute for Planetary Materials, Okayama University-Misasa, Misasa, Tottori, Japan.
  • Barucci MA; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, Meudon, France.
  • Bierhaus EB; Lockheed Martin Space, Littleton, CO, USA.
  • Campins H; Department of Physics, University of Central Florida, Orlando, FL, USA.
  • Chesley SR; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
  • Clark BE; Department of Physics and Astronomy, Ithaca College, Ithaca, NY, USA.
  • Christensen EJ; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • DellaGiustina DN; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Fornasier S; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, Meudon, France.
  • Golish DR; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Hartzell CM; Department of Aerospace Engineering, University of Maryland, College Park, MD, USA.
  • Rizk B; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Scheeres DJ; Smead Department of Aerospace Engineering, University of Colorado, Boulder, CO, USA.
  • Smith PH; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
  • Zou XD; Planetary Science Institute, Tucson, AZ, USA.
  • Lauretta DS; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
Nat Commun ; 10(1): 1291, 2019 03 19.
Article en En | MEDLINE | ID: mdl-30890725
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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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido