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The rotation state of 67P/Churyumov-Gerasimenko from approach observations with the OSIRIS cameras on Rosetta*

Mottola, S. and Lowry, S. and Snodgrass, C. and Lamy, P. L. and Toth, I. and Rozek, A. and Sierks, H. and A’Hearn, M. F. and Angrilli, F. and Barbieri, C. and Barucci, M. A. and Bertaux, J.-L. and Cremonese, G. and Da Deppo, V. and Davidsson, B. and De Cecco, M. and Debei, S. and Fornasier, S. and Fulle, M. and Groussin, O. and Gutiérrez, P. and Hviid, S. and Ip, W. and Jorda, L. and Keller, H. U. and Knollenberg, J. and Koschny, D. and Kramm, R. and Kührt, E. and Küppers, M. and Lara, L. and Lazzarin, M. and Lopez Moreno, J. J. and Marzari, F. and Michalik, H. and Naletto, G. and Rickman, H. and Rodrigo, R. and Sabau, L. and Thomas, N. and Wenzel, K.-P. and Agarwal, J. and Bertini, I. and Ferri, F. and Güttler, C. and Magrin, S. and Oklay, N. and Tubiana, C. and Vincent, J.-B. (2014) The rotation state of 67P/Churyumov-Gerasimenko from approach observations with the OSIRIS cameras on Rosetta*. Astronomy & Astrophysics, 569 (L2), pp. 1-5. EDP Sciences. DOI: 10.1051/0004-6361/201424590 ISSN 0004-6361

Full text not available from this repository.

Abstract

Aims. Approach observations with the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) experiment onboard Rosetta are used to determine the rotation period, the direction of the spin axis, and the state of rotation of comet 67P’s nucleus. Methods. Photometric time series of 67P have been acquired by OSIRIS since the post wake-up commissioning of the payload in March 2014. Fourier analysis and convex shape inversion methods have been applied to the Rosetta data as well to the available ground-based observations. Results. Evidence is found that the rotation rate of 67P has significantly changed near the time of its 2009 perihelion passage, probably due to sublimation-induced torque. We find that the sidereal rotation periods P^_{1} = 12.76129 ± 0.00005 h and P^_{2} = 12.4043 ± 0.0007 h for the apparitions before and after the 2009 perihelion, respectively, provide the best fit to the observations. No signs of multiple periodicity are found in the light curves down to the noise level, which implies that the comet is presently in a simple rotation state around its axis of largest moment of inertia. We derive a prograde rotation model with spin vector J2000 ecliptic coordinates λ = 65° ± 15° , β = +59° ± 15° , corresponding to equatorial coordinates RA = 22° , Dec = +76° . However, we find that the mirror solution, also prograde, at λ = 275° ± 15° , β = +50° ± 15° (or RA = 274° , Dec = +27° ), is also possible at the same confidence level, due to the intrinsic ambiguity of the photometric problem for observations performed close to the ecliptic plane.

Item URL in elib:https://elib.dlr.de/97424/
Document Type:Article
Title:The rotation state of 67P/Churyumov-Gerasimenko from approach observations with the OSIRIS cameras on Rosetta*
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Lowry, S.Centre for Astrophysics and Planetary Science, School of Physical Sciences, The University of Kent, Canterbury, CT2 7NH, UKUNSPECIFIED
Snodgrass, C.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Lamy, P. L.Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astro- physique de Marseille) UMR 7326, 13388 Marseille, FranceUNSPECIFIED
Toth, I.Konkoly Observatory, MTA CSFK CSI, 1525 Budapest, HungaryUNSPECIFIED
Rozek, A.Centre for Astrophysics and Planetary Science, School of Physical Sciences, The University of Kent, Canterbury, CT2 7NH, UKUNSPECIFIED
Sierks, H.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
A’Hearn, M. F.Department for Astronomy, University of Maryland, College Park, MD 20742-2421, USAUNSPECIFIED
Angrilli, F.University of Padova, Department of Physics and Astronomy, vicolo dell’Osservatorio 3, 35122, Padova, ItalyUNSPECIFIED
Barbieri, C.University of Padova, Department of Physics and Astronomy, vicolo dell’Osservatorio 3, 35122, Padova, ItalyUNSPECIFIED
Barucci, M. A.LESIA, Obs. de Paris, CNRS, Univ Paris 06, Univ. Paris-Diderot, 5 place J. Janssen, 92195 Meudon, FranceUNSPECIFIED
Bertaux, J.-L.LATMOS, CNRS/UVSQ/IPSL, 11 boulevard d’Alembert, 78280 Guyancourt, FranceUNSPECIFIED
Cremonese, G.INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Da Deppo, V.CNR-IFN UOS Padova LUXOR, via Trasea 7, 35131 Padova, ItalyUNSPECIFIED
Davidsson, B.Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, SwedenUNSPECIFIED
De Cecco, M.UNITN, Università di Trento, via Mesiano, 77, 38100 Trento, ItalyUNSPECIFIED
Debei, S.Department of Mechanical Engineering – University of Padova, via Venezia 1, 35131 Padova, ItalyUNSPECIFIED
Fornasier, S.LESIA, Obs. de Paris, CNRS, Univ Paris 06, Univ. Paris-Diderot, 5 place J. Janssen, 92195 Meudon, FranceUNSPECIFIED
Fulle, M.INAF – Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, ItalyUNSPECIFIED
Groussin, O.Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astro- physique de Marseille) UMR 7326, 13388 Marseille, FranceUNSPECIFIED
Gutiérrez, P.Instituto de Astrofíŋsica de Andalucíŋa – CSIC, 18080 Granada, SpainUNSPECIFIED
Hviid, S.stubbe.hviid (at) dlr.deUNSPECIFIED
Ip, W.Institute for Space Science, National Central University, 32054 Chung-Li, TaiwanUNSPECIFIED
Jorda, L.Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astro- physique de Marseille) UMR 7326, 13388 Marseille, FranceUNSPECIFIED
Keller, H. U.Institute for Geophysics and Extraterrestrial Physics, TU Braunschweig, 38106 Braunschweig, GermanyUNSPECIFIED
Knollenberg, J.joerg.knollenberg (at) dlr.deUNSPECIFIED
Koschny, D.Research and Scientific Support Department, European Space Agency, 2201 Noordwijk, The NetherlandsUNSPECIFIED
Kramm, R.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Küppers, M.ESA/ESAC, PO Box 78, 28691 Villanueva de la Cañada, SpainUNSPECIFIED
Lara, L.Instituto de Astrofíŋsica de Andalucíŋa – CSIC, 18080 Granada, SpainUNSPECIFIED
Lazzarin, M.University of Padova, Department of Physics and Astronomy, vicolo dell’Osservatorio 3, 35122, Padova, ItalyUNSPECIFIED
Lopez Moreno, J. J.Instituto de Astrofíŋsica de Andalucíŋa – CSIC, 18080 Granada, SpainUNSPECIFIED
Marzari, F.Dept. Physics, University of Padova, 35131 Padova, ItalyUNSPECIFIED
Michalik, H.Institut für Datentechnik und Kommunikationsnetze, 38106 Braunschweig, GermanyUNSPECIFIED
Naletto, G.Department of Information Engineering – University of Padova, via Gradenigo 6, 35131 Padova, ItalyUNSPECIFIED
Rickman, H.Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, SwedenUNSPECIFIED
Rodrigo, R.Centro de Astrobiologia (INTA-CSIC), 28850 Torrejan de Ardoz, Madrid, SpainUNSPECIFIED
Sabau, L.Instituto Nacional de Técnica Aeroespacial, 28850 Torrejon de Ardoz, SpainUNSPECIFIED
Thomas, N.Physikalisches Institut, Sidlerstrasse 5, University of Bern, 3012 Bern, SwitzerlandUNSPECIFIED
Wenzel, K.-P.Research and Scientific Support Department, European Space Agency, 2201 Noordwijk, The NetherlandsUNSPECIFIED
Agarwal, J.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Bertini, I.University of Padova, CISAS, via Venezia 15, 35100 Padova, ItalyUNSPECIFIED
Ferri, F.University of Padova, CISAS, via Venezia 15, 35100 Padova, ItalyUNSPECIFIED
Güttler, C.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Magrin, S.Department for Astronomy, University of Maryland, College Park, MD 20742-2421, USAUNSPECIFIED
Oklay, N.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Tubiana, C.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Vincent, J.-B.Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, GermanyUNSPECIFIED
Date:August 2014
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:569
DOI :10.1051/0004-6361/201424590
Page Range:pp. 1-5
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:comets, 67P/Churyumov-Gerasimenkp, photometric
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Bründl, Tara-Marie
Deposited On:08 Dec 2015 13:43
Last Modified:23 Aug 2016 09:50

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