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Secular Variations in Optical Observations of Planets: Summary

Published online by Cambridge University Press:  07 August 2017

P. K. Seidelmann
P. K. Seidelmann*
Affiliation:
U.S. Naval Observatory

Extract

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The conversion in 1984 from constants, reference frames, time scales, and ephemerides, all essentially based on theories and constants by Newcomb, to the IAU 1976 system of constants, new definitions of time scales, FK5 reference system, and integrated ephemerides has produced the expected accuracy improvements. These changes included a correction to the precession constant of 1.13 arcseconds per century, a correction to the equinox motion of the FK4 of 1.23 arcseconds per century, and a new expression for the Greenwich Mean Sidereal time.

Type
Part I - The Planetary System
Information
Symposium - International Astronomical Union , Volume 152: Chaos, Resonance and Collective Dynamical Phenomena in the Solar System , 1992 , pp. 49 - 51
Copyright
Copyright © Kluwer 1992 

References

Bretagnon, P., and Simon, J. L. (1991): private communication,Google Scholar
Chapront-Touze, M., and Chapront, J. (1988): “ELP 2000-85: a semi-analytical lunar ephemeris adequate for historical times”, Astron. Astrophys 190, 342–352 Google Scholar
Krasinsky, G. A., Aleshkina, E. Yu., Pitjeva, E. V., and Sveshnikov, M. L., (1986): “Relativistic Effects from Planetary and Lunar Observations of the XVIII – XX Centuries”, in Relativity in Celestial Mechanics and Astrometry, ed(s)., Kovalevsky, J. and Brumberg, V. A., D. Reidel Publishing Co., Dordrecht, 315–328 Google Scholar
Krasinsky, G. A., Pitjeva, E. V., Sveshinkov, M. L., and Chunayeva, L. I., (1992): “Dynamical Reference Frame and Some Astronomical Constants from Planetary Observations 1768 - 1988 YY,”, Celestial Mechanics and Dynamical Astronomy , submitted Google Scholar
Smith, C. A., and Yao, Z-G., (1991): private communication,Google Scholar
Standish, E. M., (1991): private communication,Google Scholar
Stumpff, P., and Lieske, J. H., (1984): “The motion of the Earth-Moon system in modern tabular ephemerides,”, Astron. Astrophys. 130, 211–226 Google Scholar
Yao, Z-G., and Smith, C. A., (1988): “Comparison of the Effect of Various Solar System Ephemerides on Equator and Equinox Solutions from Six-inch Transit Circle Observations of the Sun”, in Mapping the Sky, ed(s)., IAU Symposium No. 133 , Debarbat, S., Eddy, J. A., Eichhorn, H. K., and Upgren, A. R., 501–504 Google Scholar
Yao, Z-G., and Smith, C. A., (1954): “Improved Lunar Ephemeris 1952-1959”, U S Government Printing Office, Washington, DC.Google Scholar