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Orbital elements of material surrounding comet 67P/Churyumov–Gerasimenko

Davidsson, B. J. R. and Gutierrez, P. J. and Sierks, H. and Barbieri, C. and Lamy, P. L. and Rodrigo, R. and Koschny, D. and Rickman, H. and Keller, H. U. and Agarwal, J. and A’Hearn, M. F. and Barucci, M. A. and Bertaux, J.–L. and Bertini, I. and Bodewits, D. and Cremonese, G. and Da Deppo, V. and Debei, S. and De Cecco, M. and Fornasier, S. and Fulle, M. and Groussin, O. and Güttler, C. and Hviid, S. and IP, W.-H. and Jorda, L. and Knollenberg, J. and Kovacs, G. and Kramm, J.-R. and Kuehrt, E. and Küppers, M. and La Forgia, F. and Lara, L. M. and Lazzarin, M. and Lopez Moreno, J. J. and Lowry, S. and Magrin, S. and Marzari, F. and Michalik, H. and Moissl–Fraund, R. and Naletto, G. and Oklay, N. and Pajola, M. and Snodgrass, C. and Thomas, N. and Tubiana, C. and Vincent, J.–B. (2015) Orbital elements of material surrounding comet 67P/Churyumov–Gerasimenko. Astronomy & Astrophysics (583), A16. EDP Sciences. doi: 10.1051/0004-6361/201525841. ISSN 0004-6361.

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Context. The dust coma within the Hill sphere of comet 67P/Churyumov–Gerasimenko. Aims. To determine osculating orbital elements for individual distinguishable but unresolved slow–moving grains in the vicinity of the nucleus. To perform photometry and constrain grain sizes. Methods. Astrometry and photometry using images acquired by the OSIRIS Wide Angle Camera on the European Space Agency spacecraft Rosetta. Standard orbit determination and orbit improvement techniques were employed. Results. Orbital elements and effective diameters of four grains could be constrained but not uniquely determined. Two of the grains have lightcurves indicative of grain rotation. Conclusions. The four grains have diameters nominally in the range 0.14–0.50 meters. For three of the grains, elliptic orbits can be found, which is consistent with a cloud of bound particles around the nucleus. However, hyperbolic escape trajectories cannot be excluded for any of the grains, and for one grain this is the only known option. One grain may have originated from the surface shortly before observation. These results have possible implications for the understanding of dispersal of the cloud of bound debris around comet nuclei, as well as the ejection of large grains far from the sun.

Item URL in elib:https://elib.dlr.de/96967/
Document Type:Article
Title:Orbital elements of material surrounding comet 67P/Churyumov–Gerasimenko
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gutierrez, P. J.Instituto de Astrofísica de Andalucía – CSIC, Granada, SpainUNSPECIFIED
Sierks, H.Max-Planck-Institut für Sonnensystemforschung, Göttingen, GermanyUNSPECIFIED
Barbieri, C.University of Padova, Padova, ItalyUNSPECIFIED
Lamy, P. L.Aix-Marseille Universite, CNRS, LAMUNSPECIFIED
Rodrigo, R.Centro de Astrobiologia / International Space Science InstituteUNSPECIFIED
Rickman, H.Department of Astronomy and Space Physics, UppsalaUNSPECIFIED
Keller, H. U.Institut für Geophysik und extraterrestrische Physik (IGEP),UNSPECIFIED
Agarwal, J.Max-Planck-Institut für SonnensystemforschungUNSPECIFIED
A’Hearn, M. F.University of Maryland, Department of Astronomy, College Park,UNSPECIFIED
Barucci, M. A.LESIA–Observatoire de Paris, CNRS, Université Pierre et MarieUNSPECIFIED
Bertaux, J.–L.LATMOS, CNRS/UVSQ/IPSL, 11 boulevard d’Alembert, 78280UNSPECIFIED
Bertini, I.Centro di Ateneo di Studi ed Attivitá Spaziali “Giuseppe Colombo”UNSPECIFIED
Bodewits, D.University of Trento, via Mesiano 77, 38100 Trento, ItalyUNSPECIFIED
Cremonese, G.INAF - Osservatorio Astronomico di PadovaUNSPECIFIED
Debei, S.University of Maryland, Department of Astronomy, College Park,UNSPECIFIED
De Cecco, M.Department of Industrial Engineering – University of Padova, viaUNSPECIFIED
Fornasier, S.Observatoire de Paris-Meudon, FranceUNSPECIFIED
Fulle, M.INAF - Osservatorio Astronomico di Trieste, Trieste, ItalyUNSPECIFIED
Groussin, O.Laboratoire d'Astrophysique de Marseille, FranceUNSPECIFIED
Güttler, C.Max-Planck-Institut für SonnensystemforschungUNSPECIFIED
IP, W.-H.Nationa Central Univ., Institute of Astronomy, Chung-Li, TaiwanUNSPECIFIED
Jorda, L.Laboratoire d'Astrophysique de Marseille, FranceUNSPECIFIED
Kovacs, G.Max–Planck–Institut für Sonnensystemforschung, Justus–von–UNSPECIFIED
Kramm, J.-R.Max–Planck–Institut für Sonnensystemforschung, Justus–von–UNSPECIFIED
Küppers, M.European Space Astronomy Centre (ESAC), Madrid, SpainUNSPECIFIED
La Forgia, F.University of Padova, Department of Physics and Astronomy,UNSPECIFIED
Lara, L. M.Instituto de Astrofisica de Andalucia, CSIC, Granada, SpainUNSPECIFIED
Lazzarin, M.University of Padova, Department of Physics and AstronomyUNSPECIFIED
Lopez Moreno, J. J.Instituto de Astrofísica de Andalucía, Granada, SpainUNSPECIFIED
Lowry, S.University of Kent, Canterbury, UKUNSPECIFIED
Magrin, S.University of Padova, Department of Physics and Astronomy, viaUNSPECIFIED
Marzari, F.Università di Padova, Departimento di Fisica, Padova, ItalyUNSPECIFIED
Michalik, H.Institut für Datentechnik und Kommunikationsnetze (IDA), Technische Universität Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig, GermanyUNSPECIFIED
Moissl–Fraund, R.Operations Department, European Space Astronomy Centre/ESA,UNSPECIFIED
Naletto, G.Università di Padova, Departimento di Elettronica et Informatica, Padova, ItalyUNSPECIFIED
Oklay, N.Max-Planck-Institut für SonnensystemforschungUNSPECIFIED
Pajola, M.CISAS - Center for Studies and Activities for Space, University of PadovaUNSPECIFIED
Snodgrass, C.Planetary and Space Sciences, Department of Physical Sciences,UNSPECIFIED
Thomas, N.Physikalisches Institut, University of Bern, CHUNSPECIFIED
Tubiana, C.Max-Planck-Institut fuer Sonnensystemforschung, GermanyUNSPECIFIED
Vincent, J.–B.Max–Planck–Institut für Sonnensystemforschung, Justus–von–UNSPECIFIED
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:A16
Publisher:EDP Sciences
Keywords:astrometry – celestial mechanics – comet: individual: 67P/Churyumov–Gerasimenko
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Bründl, Tara-Marie
Deposited On:30 Nov 2015 13:16
Last Modified:23 Aug 2016 09:50

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