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A&A 417, 1165-1171 (2004)
DOI: 10.1051/0004-6361:20035663

An approximation to the errors in the planetary ephemerides of the Astronomical Almanac

E. M. Standish

CalTech/Jet Propulsion Laboratory, 301-150, Pasadena, CA 91109, USA
(Received 12 November 2003 / Accepted 13 January 2004 )

Abstract
Errors in the planetary coordinates of the Astronomical Almanac are approximated by comparing their fundamental ephemerides, upon which they are based, with a more recent ephemeris. JPL's DE200 provided the fundamental planetary and lunar ephemerides of the Astronomical Almanac for the years, 1984-2002, and DE405 has replaced DE200 in that role, starting in 2003. Recently, new observational measurements have become available, thereby enabling further improvements in the ephemerides, and thus, a measure of the previous errors.

Key words: ephemerides

© ESO 2004

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