Orientation of the FK4 Catalogue from Meridian Observations of the Moon

The present basis for the ephemeris of Mars in the National Ephemerides is the theory of S. Newcomb (1898) as amended by the corrections of Ross (1917). These amendments by Ross, however, are empirical in nature and therefore the present ephemeris of Mars does not have a strictly gravitational basis. In order to provide a gravitationally consistent basis for the ephemeris of Mars, Clemence (1949, 1961) constructed a new general perturbation theory based on the final elements of Mars as derived by Newcomb for the epoch 1850. To test the adequacy and accuracy of this new theory, Clemence compared it against 87 observations from 1802-1839 and 1931-1950. This provided provisional values of the constants (without secular variation) for his new theory. These provisional elements and Clemence's theory were used to produce a heliocentric ephemeris of Mars for the period 1800-2000 (Duncombe and Clemence 1960, Duncombe 1964).

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“…Naval Observatory (Adams, et al 1964(Adams, et al , 1967Klock, et al 1970Klock, et al , 1973 Table I …”

mentioning

confidence: 99%

Observations of Mars 1950-1976 Compared to Ephemerides

Duncombe¹,

Kubo²,

Seidelmann³

1979

Symp. - Int. Astron. Union

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Apport Des Observations D’occultations Stellaires En Vue Du Rattachement Du Systeme Dynamique Au Systeme Geometrique.

Frœschlé¹,

Meyer²

1981

Reference Coordinate Systems for Earth Dynamics

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The use of solar eclipse timings to compare the reference systems of Newcomb's Tables of the Sun and of the Improved Lunar Ephemeris

1971

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Photoelectric, photographic, and visual observations of second and third contacts of the total solar eclipses of 12 November, 1966 and 7 March, 1970 are analyzed. The observations indicate a difference in the reference system of Newcomb's Tables of the Sun as compared to the reference system of the Improved Lunar Ephemeris (J= 2) of 0.~911 +_ 0.~034 m.e. The correction is to be applied in the sense of reducing the value of AT as tabulated in the American Ephemeris when interpolating the position of the Moon.

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Orientation of the FK4 Catalogue from Meridian Observations of the Moon

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Observations of Mars 1950-1976 Compared to Ephemerides

Observations of Mars 1950-1976 Compared to Ephemerides

Apport Des Observations D’occultations Stellaires En Vue Du Rattachement Du Systeme Dynamique Au Systeme Geometrique.

The use of solar eclipse timings to compare the reference systems of Newcomb's Tables of the Sun and of the Improved Lunar Ephemeris

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