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The small satellites of Pluto as observed by New Horizons.
Weaver, H A; Buie, M W; Buratti, B J; Grundy, W M; Lauer, T R; Olkin, C B; Parker, A H; Porter, S B; Showalter, M R; Spencer, J R; Stern, S A; Verbiscer, A J; McKinnon, W B; Moore, J M; Robbins, S J; Schenk, P; Singer, K N; Barnouin, O S; Cheng, A F; Ernst, C M; Lisse, C M; Jennings, D E; Lunsford, A W; Reuter, D C; Hamilton, D P; Kaufmann, D E; Ennico, K; Young, L A; Beyer, R A; Binzel, R P; Bray, V J; Chaikin, A L; Cook, J C; Cruikshank, D P; Dalle Ore, C M; Earle, A M; Gladstone, G R; Howett, C J A; Linscott, I R; Nimmo, F; Parker, J Wm; Philippe, S; Protopapa, S; Reitsema, H J; Schmitt, B; Stryk, T; Summers, M E; Tsang, C C C; Throop, H H B; White, O L.
Afiliação
  • Weaver HA; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA. hal.weaver@jhuapl.edu.
  • Buie MW; Southwest Research Institute, Boulder, CO 80302, USA.
  • Buratti BJ; NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Grundy WM; Lowell Observatory, Flagstaff, AZ 86001, USA.
  • Lauer TR; National Optical Astronomy Observatory, Tucson, AZ 26732, USA.
  • Olkin CB; Southwest Research Institute, Boulder, CO 80302, USA.
  • Parker AH; Southwest Research Institute, Boulder, CO 80302, USA.
  • Porter SB; Southwest Research Institute, Boulder, CO 80302, USA.
  • Showalter MR; SETI Institute, Mountain View, CA 94043, USA.
  • Spencer JR; Southwest Research Institute, Boulder, CO 80302, USA.
  • Stern SA; Southwest Research Institute, Boulder, CO 80302, USA.
  • Verbiscer AJ; Department of Astronomy, University of Virginia, Charlottesville, VA 22904, USA.
  • McKinnon WB; Department of Earth and Planetary Sciences, Washington University, St. Louis, MO 63130, USA.
  • Moore JM; Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
  • Robbins SJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Schenk P; Lunar and Planetary Institute, Houston, TX 77058, USA.
  • Singer KN; Southwest Research Institute, Boulder, CO 80302, USA.
  • Barnouin OS; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Cheng AF; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Ernst CM; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Lisse CM; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Jennings DE; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Lunsford AW; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Reuter DC; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Hamilton DP; Department of Astronomy, University of Maryland, College Park, MD 20742, USA.
  • Kaufmann DE; Southwest Research Institute, Boulder, CO 80302, USA.
  • Ennico K; Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
  • Young LA; Southwest Research Institute, Boulder, CO 80302, USA.
  • Beyer RA; SETI Institute, Mountain View, CA 94043, USA. Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
  • Binzel RP; Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Bray VJ; University of Arizona, Tucson, AZ 85721, USA.
  • Chaikin AL; Independent science writer, Arlington, VT, USA.
  • Cook JC; Southwest Research Institute, Boulder, CO 80302, USA.
  • Cruikshank DP; Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
  • Dalle Ore CM; Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
  • Earle AM; University of Arizona, Tucson, AZ 85721, USA.
  • Gladstone GR; Southwest Research Institute, San Antonio, TX 78238, USA.
  • Howett CJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Linscott IR; Stanford University, Stanford, CA 94305, USA.
  • Nimmo F; University of California, Santa Cruz, CA 95064, USA.
  • Parker JW; Southwest Research Institute, Boulder, CO 80302, USA.
  • Philippe S; Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France.
  • Protopapa S; Department of Astronomy, University of Maryland, College Park, MD 20742, USA.
  • Reitsema HJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Schmitt B; Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France.
  • Stryk T; Roane State Community College, Oak Ridge, TN 37830, USA.
  • Summers ME; George Mason University, Fairfax, VA 22030, USA.
  • Tsang CC; Southwest Research Institute, Boulder, CO 80302, USA.
  • Throop HH; Planetary Science Institute, Tucson, AZ 85719, USA.
  • White OL; Space Science Division, NASA Ames Research Center, Moffett Field, CA 94035, USA.
Science ; 351(6279): aae0030, 2016 Mar 18.
Article em En | MEDLINE | ID: mdl-26989256
ABSTRACT
The New Horizons mission has provided resolved measurements of Pluto's moons Styx, Nix, Kerberos, and Hydra. All four are small, with equivalent spherical diameters of ~40 kilometers for Nix and Hydra and ~10 kilometers for Styx and Kerberos. They are also highly elongated, with maximum to minimum axis ratios of ~2. All four moons have high albedos (~50 to 90%) suggestive of a water-ice surface composition. Crater densities on Nix and Hydra imply surface ages of at least 4 billion years. The small moons rotate much faster than synchronous, with rotational poles clustered nearly orthogonal to the common pole directions of Pluto and Charon. These results reinforce the hypothesis that the small moons formed in the aftermath of a collision that produced the Pluto-Charon binary.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos