The IAU 2009 system of astronomical constants: the report of the IAU working group on numerical standards for Fundamental Astronomy

  • Brian LuzumEmail author
  • Nicole Capitaine
  • Agnès Fienga
  • William Folkner
  • Toshio Fukushima
  • James Hilton
  • Catherine Hohenkerk
  • George Krasinsky
  • Gérard Petit
  • Elena Pitjeva
  • Michael Soffel
  • Patrick Wallace
Open Access


In the 2006–2009 triennium, the International Astronomical Union (IAU) Working Group on Numerical Standards for Fundamental Astronomy determined a list of Current Best Estimates (CBEs). The IAU 2009 Resolution B2 adopted these CBEs as the IAU (2009) System of Astronomical Constants. Additional work continues to define the process of updating the CBEs and creating a standard electronic document.


Numerical standards Fundamental Astronomy Fundamental constants 



The authors would like to thank the anonymous reviewer for the careful reading and the helpful suggestions.

Open Access

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2011

Authors and Affiliations

  • Brian Luzum
    • 1
    Email author
  • Nicole Capitaine
    • 2
  • Agnès Fienga
    • 3
  • William Folkner
    • 4
  • Toshio Fukushima
    • 5
  • James Hilton
    • 1
  • Catherine Hohenkerk
    • 6
  • George Krasinsky
    • 7
  • Gérard Petit
    • 8
  • Elena Pitjeva
    • 7
  • Michael Soffel
    • 9
  • Patrick Wallace
    • 10
  1. 1.U.S. Naval ObservatoryWashingtonUSA
  2. 2.SYRTE, Observatoire de ParisCNRS, UPMCParisFrance
  3. 3.Institut UTINAM, Université de Franche-Comté, CNRS-UMR 6123BesançonFrance
  4. 4.Jet Propulsion LaboratoryCAUSA
  5. 5.National Astronomical ObservatoryTokyoJapan
  6. 6.HM Nautical Almanac OfficeTauntonUK
  7. 7.Institute of Applied AstronomyRASSt. PetersburgRussia
  8. 8.Bureau International des Poids et MesuresSèvresFrance
  9. 9.Dresden Technical UniversityDresdenGermany
  10. 10.Rutherford Appleton LaboratoryChiltonUK

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