************************************************************************ IERS Message No. 375 March 15, 2019 ************************************************************************ Journees 2019: Astrometry, Earth Rotation and Reference Systems Dear colleagues A colloquium entitled "Journees 2019: Astrometry, Earth Rotation and Reference Systems in the Gaia era" will be held at Paris Observatory on October 7th, 8th and 9th, 2019. This symposium will be organized jointly by IAU Commissions A1 (Astrometry) and A2 (Rotation of the Earth). It will also be the occasion to celebrate the 100th birthday of Commission A2 (formerly named Commission 19). Scientific objectives These Journees 2019 are sponsored by Paris Observatory, CNRS-INSU, GRAM and co-sponsored by the International Astronomical Union (IAU) and the International Association of Geodesy (IAG). They are in the direct continuation of the recurrent Journees which have been organized with success during more than two decades. The main purpose of this international meeting is to provide a forum for advanced discussions in the fields of astrometry, Earth rotation, space and time reference systems and frames, solar system dynamics and ephemerides, time metrology and space navigation. A particular attention will be given to the recent progress made in the fields of astrometry due to the exploitation of the Gaia mission and to the recently adopted ICRF3, as well as to the celebration of the Centenary of the IAU Commission "Rotation of the Earth", with scientific and historic contributions. Topics of the Journees (not exclusive) Advances in astrometry at solar system, galactic and extragalactic scales Rotation of the Earth Solar system dynamics Reference systems and frames Time and frequency metrology Ephemerides Space navigation Information and registration People interested to participate are invited to register soon at: https://syrte.obspm.fr/astro/journees2019 Deadline: June 30th, 2019 With best regards Jean Souchay ************************************************************************ IERS Messages are edited and distributed by the IERS Central Bureau. If not stated otherwise, the IERS is only the distributor of the message and is not responsible for its content. To submit texts for distribution, please write to . To subscribe or unsubscribe, please create an IERS account or modify it: https://www.iers.org/Login/Login/EN/login_node.html or write to . Archives: http://www.iers.org/Messages/ ************************************************************************