IAU Division I Working Group
Numerical Standards for Fundamental Astronomy
ASTRONOMICAL CONSTANTS


Welcome to the web page for the International Astronomical Union (IAU) Working Group (WG) on Numerical Standards for Fundamental Astronomy (NSFA). This WG was set up by a proposal adopted at the IAU General Assembly in 2006. The stated goals of the WG based on the proposal are:

News ...

2011 July:   WG Report Published

The report of this WG that lists the IAU 2009 System of Astronomical Constants together with all the detailed notes and explanations has been published in Celestial Mechanics and Dynamical Astronomy under Open Access. Open Access permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

2011 May:   Updated

The pages with the IAU 2009 constants have finally been aligned and corrected to agree with the Report to be published in Celestial Mechanics and Dynamical Astronomy. Until the Current Best Estimates require updating they are in agreement with the IAU 2009 Constants.

2011 February 16:   New web pages adopted

The new NFSA web pages have now been adopted as the official pages.

2010 September 19   Journees 2010

The Working Group meet after the Journees at the Paris Observatory. At the meeting procedures for the adoption new best estimates was discussed. A proposal concerning the definition of the astronomical unit was considered.

NSFA Discussion Documents, Meetings and Reports


 © IAU, 2010-2011 Valid HTML 4.01 Transitional Valid CSS! 4.01 Transitional