BDL International Astronomical Union IAU/UAI IAU Symposium nø172 Dynamics, ephemerides and astrometry of the solar system Paris, France, July 3-8, 1995 in connection with the celebration of the bicentenary of Bureau des longitudes under the presidency of J. Kovalevsky FINAL ANNOUNCEMENT Scientific Organizing Committee: Chairman: S. Ferraz-Mello (Universidade de sao Paulo, Brazil) Co-chairman: B. Morando (Bureau des longitudes, France) Members: J.E. Arlot (Bureau des longitudes, France) V. Brumberg (Institute of Applied Astronomy, St-Petersbourg, Russia) A. Carusi (Reparto di Planetologia, Roma, Italy) S. Debarbat (Observatoire de Paris, France) J. Henrard (Faculte universitaire Notre-Dame de la Paix, Namur, Belgium) J. Kovalevsky (Observatoire de la Cote d'Azur, France) Y. Kozai (Tokyo Observatory, Japan) J.H. Lieske (Jet Propulsion Laboratory, Pasadena, USA) A. Milani (University of Pisa, Italy) P.K. Seidelmann (U.S. Naval Observatory, Washington, D.C., USA) Ye Shu Hua (Shanghai Observatory, China, PR) B.D. Yallop (Royal Greenwich Observatory, Cambridge, Great-Britain) Sponsors: This symposium is sponsored by IAU (International Astronomical Union) commissions 7 (Celestial Mechanics), 20 (Positions and motions of asteroids, comets and satellites), 4 (Ephemerides), 8 (Positional astronomy), by CNRS (Centre National de la Recherche Scientifique), by Bureau des Longitudes and by the French Ministere de l'Enseignement Superieur et de la Recherche. Scientific program: The aim of this symposium is to gather astronomers interested in the current knowledge of the solar system. The following topics will be covered: -dynamics: evolution of the system, chaotic behaviour, relativistic effects, analytical and numerical theories of planets, natural satellites and small bodies; -mathematical techniques: symplectic mappings, elliptic functions and algebraic manipulators; -ephemerides: limits of predictability (resonance and chaos), accurate short term and long term predictions, real-time update, optimal representations, numerical integration, near-Earth objects; -observations: astrometry from space, ground-based astrometric observations of high accuracy (CCD, optical interferometry, VLA, VLBI, radar, lunar laser ranging results and pulsar timings connected to solar system ephemerides); -dynamical reference system and astronomical standards. This symposium will be organized in connection with the celebration of the bicentenary of Bureau des longitudes and historical aspects of the progress in celestial mechanics and in ephemerides will be covered during the symposium by invited lectures. Tentative list of invited lectures: Laskar: Large scale chaos in the solar system Bretagnon: Short term accurate ephemerides (10 000 years) Hadjidemetriou: Symplectic mappings Jewitt: The solar system beyond Neptune Standish: New accuracy levels in the solar system Klioner: Relativistic effects in the movements and observations of celestial bodies Soffel: Relativistic equations of the motion of celestial bodies Kinoshita: The motion of Pluto Lieske: Galilean satellites Duriez: Satellites of Saturn Brumberg: Elliptic functions Deprit: Algebraic manipulations in celestial mechanics Scotti: Discovery and astrometry of comets and asteroids with spacewatch Ostro: Radar astrometry of asteroids, comets and planetary satellites Newhall: to be defined Eubanks: VLBI solar system observations Chandler: Millisecond pulsar and ephemerides in the solar system Pascu: Long-focus CCD astrometry of Planetary Satellites Kovalevsky: Reference frames Marsden: From telescope to MPC: Organizing the Minor Planets Henrard: Dynamics inside the Kirkwood gaps Seidelmann: Evolution of ephemerides representation and diffusion. Fukushima: Astronomical standards in the solar system. Milani: Proper elements of chaotic asteroids Morando: Two hundred years of celestial mechanics under the auspices of Bureau des longitudes. Doggett: Primus inter pares: the place of Bureau des longitudes among the National Ephemeris Offices. Contributed papers: Oral communications will be 15 minutes long including questions. Slide projectors, overhead projectors and video projectors will be available. Oral communications are encouraged to be given in french: a simultaneous translation will be provided. Posters may not exceed 1meter x 1meter. The scientific organizing committee retains the right to shift proposed oral communications into posters (and vice versa) depending on the subject. In that case, the authors will be notified. Abstracts: Note that the deadline to send the abstracts was April 1. If you forgot to send your abstract, do it as soon as possible. The abstracts will be published in a book of abstracts distributed to the participants before the symposium and contributed papers will be accepted only if the abstract is provided. Proceedings: The accepted contributed papers should be published with the invited review papers in the proceedings. Contributed papers should not exceed 3 pages. The proceedings will be published by Kluwer Academic Press, Holland in the IAU Symposia Series. The editors will be S. Ferraz-Mello, B. Morando and J.E. Arlot. Schedule of inscriptions, Registration: If you plan to attend the Symposium, please return the registration form before May 15, 1995. The registration fee has been set at 550 French Francs (about 100 US dollars subject to exchange rate fluctuations) and will be of 700 French Francs if the registration is made after May 15. Note that, due to the limited number of participants, registrations after May 15 may not be surely accepted. The registration fee is to be paid by bank check or by Visa card and will be sent together with the registration form. This includes the attendance to the manifestations related to the celebration of the bicentenary of Bureau des longitudes, the coffee-breaks during the symposium, a reception of the participants, social events and entertainments. Social events: An historical review will be made on July 3 afternoon to celebrate the bicentenary of Bureau des longitudes followed by a reception of the participants in the gardens of Paris Observatory. For the following evenings, a concert will be proposed and a spectacle (in french) will be given on the history of the measurement of the Paris meridian at the end of the XVIIIth century. Agenda of the symposium: July 3: registration (1 rue Descartes, Paris 5eme) from 10h to 19h afternoon: celebration of the bicentenary of Bureau des longitudes July 4-7: scientific sessions of the symposium (8h30-12h30 and 14h30 18h30) July 8: scientific sessions of the symposium (8h30-12h30) afternoon and July 9: tours proposed at the registration desk. Visas: The enclosed invitation letter should be sufficient to obtain a visa to come in France. If necessary, contact us by e-mail. Local organizing committee: J.E. Arlot (chairman), W. Thuillot (vice-chairman), A. Bec-Borsenberger, L. Bergeal, P. Bretagnon, N. Capitaine, J. Renaudineau. Local contact: All the correspondence (either for the SOC or for the LOC) shall be sent to: Bureau des longitudes/IAU Symposium 172 77 avenue Denfert-Rochereau F-75014 Paris, France fax: (33) 1 46 33 28 34 e-mail: bdl95@imcce.fr Informations concerning the Symposium is available through Internet using the Web Server at the following address: http://www.imcce.fr/sympo/uai172.html Conference site: The scientific sessions of the symposium will be held at the Carre des sciences 1 rue Descartes, Paris 5eme (in the latin quarter). Climate: The weather in Paris in July is usually warm (20 to 28 degrees) and dry. Accomodations in Paris: Hotel reservations should be made through the registration form before the deadline. The proposed hotels will be at less than 500 meters from the conference site, except for the student rooms (however easily reachable by subway). The student rooms are proposed for FF 100 (about $20) including breakfast. Lunches will be available in the area of the conference site in small restaurants (from 60 to 150 French Francs). It will be also possible to have lunches on the conference site (130 French Francs). Transportations: Paris is reachable by the major airways companies. Inside Paris, travelling by car is not easy, but public transportations are easy to use (be carefull from the pickpockets...). With a photograph, you may get a low rate transportation pass valid on buses, subways and trains in the Paris area during the time of the Symposium.