Selected astronomical constants are given along with their associated references. Included are values used in the production of The Astronomical Almanac. In some cases, differing sources yield differing values; in those instances more than one value may be given.

 
  • 2014 Selected Astronomical Constants in PDF and ASCII format
  • 2013 Selected Astronomical Constants in PDF and ASCII format
  • 2012 Selected Astronomical Constants in PDF and ASCII format
  • 2011 Selected Astronomical Constants in PDF and ASCII format
  • 2010 Selected Astronomical Constants in PDF and ASCII format
  • 2009 Selected Astronomical Constants in PDF and ASCII format
  • 2008 Selected Astronomical Constants in PDF and ASCII format
  • 2007 Selected Astronomical Constants in PDF and ASCII format
  • 1976 IAU Constants in PDF
The Astronomical Almanac Online! 2014
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