Scientific Rationale
These Journées will be the twentieth conference in this series whose main purpose is to provide a forum for advanced discussion in the fields of space and time reference systems, Earth rotation, solar system ephemerides, astrometry and time.

The Journées 2010 will be focused on the issues related to the recent developments and new challenges in astronomical space and time reference systems and their relativistic aspects, astrometric catalogs, Earth orientation, astronomical constants and numerical standards, planetary ephemerides and modern astrometry.

There will be presentations and discussions related to the IAU Working Groups, such as "Numerical Standards for Fundamental astronomy" (NSFA), or Division 1 commissions.

There will be a special session for presentating the latest developments in the solar system ephemerides and comparing details in those ephemerides.

Latest update: 11/12/2009