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A contact binary satellite of the asteroid (152830) Dinkinesh.
Levison, Harold F; Marchi, Simone; Noll, Keith S; Spencer, John R; Statler, Thomas S; Bell, James F; Bierhaus, Edward B; Binzel, Richard; Bottke, William F; Britt, Daniel; Brown, Michael E; Buie, Marc W; Christensen, Philip R; Dello Russo, Neil; Emery, Joshua P; Grundy, William M; Hahn, Matthias; Hamilton, Victoria E; Howett, Carly; Kaplan, Hannah; Kretke, Katherine; Lauer, Tod R; Manzoni, Claudia; Marschall, Raphael; Martin, Audrey C; May, Brian H; Mottola, Stefano; Olkin, Catherine B; Pätzold, Martin; Parker, Joel Wm; Porter, Simon; Preusker, Frank; Protopapa, Silvia; Reuter, Dennis C; Robbins, Stuart J; Salmon, Julien; Simon, Amy A; Stern, S Alan; Sunshine, Jessica M; Wong, Ian; Weaver, Harold A; Adam, Coralie; Ancheta, Shanti; Andrews, John; Anwar, Saadat; Barnouin, Olivier S; Beasley, Matthew; Berry, Kevin E; Birath, Emma; Bolin, Bryce.
Afiliação
  • Levison HF; Southwest Research Institute, Boulder, CO, USA. hal.levison@swri.org.
  • Marchi S; Southwest Research Institute, Boulder, CO, USA.
  • Noll KS; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Spencer JR; Southwest Research Institute, Boulder, CO, USA.
  • Statler TS; NASA Headquarters, Washington, DC, USA.
  • Bell JF; Arizona State University, Tempe, AZ, USA.
  • Bierhaus EB; Lockheed Martin Space, Littleton, CO, USA.
  • Binzel R; Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Bottke WF; Southwest Research Institute, Boulder, CO, USA.
  • Britt D; University of Central Florida, Orlando, FL, USA.
  • Brown ME; California Institute of Technology, Pasadena, CA, USA.
  • Buie MW; Southwest Research Institute, Boulder, CO, USA.
  • Christensen PR; Arizona State University, Tempe, AZ, USA.
  • Dello Russo N; Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
  • Emery JP; Northern Arizona University, Flagstaff, AZ, USA.
  • Grundy WM; Northern Arizona University, Flagstaff, AZ, USA.
  • Hahn M; Lowell Observatory, Flagstaff, AZ, USA.
  • Hamilton VE; Rheinisches Institut für Umweltforschung an der Universität zu Köln, Cologne, Germany.
  • Howett C; Southwest Research Institute, Boulder, CO, USA.
  • Kaplan H; University of Oxford, Oxford, UK.
  • Kretke K; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Lauer TR; Southwest Research Institute, Boulder, CO, USA.
  • Manzoni C; NSF's National Optical-Infrared Astronomy Research Laboratory, Tucson, AZ, USA.
  • Marschall R; London Stereoscopic Company, London, UK.
  • Martin AC; CNRS, Observatoire de la Côte d'Azur, Laboratoire J.-L. Lagrange, Nice, France.
  • May BH; University of Central Florida, Orlando, FL, USA.
  • Mottola S; London Stereoscopic Company, London, UK.
  • Olkin CB; DLR Institute of Planetary Research, Berlin, Germany.
  • Pätzold M; Muon Space, Mountain View, CA, USA.
  • Parker JW; Rheinisches Institut für Umweltforschung an der Universität zu Köln, Cologne, Germany.
  • Porter S; Southwest Research Institute, Boulder, CO, USA.
  • Preusker F; Southwest Research Institute, Boulder, CO, USA.
  • Protopapa S; DLR Institute of Planetary Research, Berlin, Germany.
  • Reuter DC; Southwest Research Institute, Boulder, CO, USA.
  • Robbins SJ; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Salmon J; Southwest Research Institute, Boulder, CO, USA.
  • Simon AA; Southwest Research Institute, Boulder, CO, USA.
  • Stern SA; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Sunshine JM; Southwest Research Institute, Boulder, CO, USA.
  • Wong I; University of Maryland, College Park, MD, USA.
  • Weaver HA; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Adam C; American University, Washington, DC, USA.
  • Ancheta S; Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
  • Andrews J; KinetX Space Navigation and Flight Dynamics Practice, Simi Valley, CA, USA.
  • Anwar S; Lockheed Martin Space, Littleton, CO, USA.
  • Barnouin OS; Southwest Research Institute, Boulder, CO, USA.
  • Beasley M; Arizona State University, Tempe, AZ, USA.
  • Berry KE; Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
  • Birath E; Southwest Research Institute, Boulder, CO, USA.
  • Bolin B; NASA Goddard Space Flight Center, Greenbelt, MD, USA.
Nature ; 629(8014): 1015-1020, 2024 May.
Article em En | MEDLINE | ID: mdl-38811709
ABSTRACT
Asteroids with diameters less than about 5 km have complex histories because they are small enough for radiative torques (that is, YORP, short for the Yarkovsky-O'Keefe-Radzievskii-Paddack effect)1 to be a notable factor in their evolution2. (152830) Dinkinesh is a small asteroid orbiting the Sun near the inner edge of the main asteroid belt with a heliocentric semimajor axis of 2.19 AU; its S-type spectrum3,4 is typical of bodies in this part of the main belt5. Here we report observations by the Lucy spacecraft6,7 as it passed within 431 km of Dinkinesh. Lucy revealed Dinkinesh, which has an effective diameter of only 720 m, to be unexpectedly complex. Of particular note is the presence of a prominent longitudinal trough overlain by a substantial equatorial ridge and the discovery of the first confirmed contact binary satellite, now named (152830) Dinkinesh I Selam. Selam consists of two near-equal-sized lobes with diameters of 210 m and 230 m. It orbits Dinkinesh at a distance of 3.1 km with an orbital period of about 52.7 h and is tidally locked. The dynamical state, angular momentum and geomorphologic observations of the system lead us to infer that the ridge and trough of Dinkinesh are probably the result of mass failure resulting from spin-up by YORP followed by the partial reaccretion of the shed material. Selam probably accreted from material shed by this event.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article