The proposal for a new definition of the CEP and for new parameters for Earth orientation in the ICRS will be under discussion at the IAU Colloquium 180 in Washington at the end of March. It is to be hoped that a proposal on these issues can be endorsed by the subgroup T5 (which is in charge of these issues) and can be presented to this Colloquium 180 for a recommendation.
The present Newsletter of the subgroup T5 is devoted to the preliminay conclusions of the discussions concerning a modern definition of the CEP and new parameters for representing the orientation of the Earth in the ICRS and to proposals and preliminary recommendations on these issues for the IAU Colloquium 180.
It includes the following sections :