Primary constants in IAU 1976 System of Astronomical Constants.

Details Primary constants in IAU 1976 System of Astronomical Constants. Primary constants in IAU 1976 System of Astronomical Constants.

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pabei..17...15x&link_type=abstract

Prog. Astron., Vol. 17, No. 1, p. 15 - 24

Astronomy and Astrophysics

Astronomy

Astronomical Constants

Scientific paper

The determination method and the current best estimates of the primary constants in the IAU 1976 System of Astronomical Constants are reviewed. It indicates that ten primary constants have changed a great deal. The speed of light becomes the defining constant; the Earth equatorial radius may be replaced by the geopotential value of the geoid; the general precession in longitude needs to be revised; the nutational constant is unsuitable for the name of the primary constant; other constants have also new values. The IAU 1976 System of Astronomical Constants falls behind the latest development in astronomy. Its improvement and modification must be made.

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