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Dynamics and Astrometry of Natural and Artificial Celestial by Donald K. Yeomans (auth.), I. M. Wytrzyszczak, J. H. Lieske,

By Donald K. Yeomans (auth.), I. M. Wytrzyszczak, J. H. Lieske, R. A. Feldman (eds.)

IAU Colloquium one hundred sixty five, Dynamics and Astrometry of typical and ArtificialCelestial Bodies, used to be held in Poznan, Poland, in July 1996, bringing jointly over two hundred scientists from 27 international locations who mentioned their paintings in 179 oral and poster displays. the current quantity includes eighty three of the papers awarded on the assembly.
The assembly introduced jointly experts from assorted fields who eager about the very shut collaboration among dynamics and astrometry, the place one self-discipline contributes to the development of the opposite.
The oral periods have been geared up into common different types referring to:

  • solar process dynamics;
  • new observational concepts, catalogues, and astrometry;
  • dynamics and observational difficulties of man-made satellites and area particles;
  • rotation of sunlight method gadgets;
  • reference platforms and astronomical criteria;
  • new mathematical recommendations;
  • and 3 all-day poster sessions.

This quantity is split into seven components, comprising eighty three contributions, an inventory of contributors and an index.

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Additional info for Dynamics and Astrometry of Natural and Artificial Celestial Bodies: Proceedings of IAU Colloquium 165 Poznań, Poland July 1 – 5, 1996

Example text

1986) to recommend that 8t be added to the published observation times for the 1973 and 1979 data. That was implemented in the analysis of developing the ephemerides E5. , 1996), it was intended that no value of 8t would be required but that instead the authors would incorporate the phase effects into their published times and separations. However, the effects were added in the incorrect direction for the pu blished data and hence it is recommended (Aksnes, 1993; Franklin, 1993; Lieske, 1995a) that the 1985 and 1991 data be employed by adding twice the published values of 8t to the observation times.

6 to ephemeris E3. A plus sign indicates an increase and a minus sign indicates a decrease in the weighted residuals. 1. S. Naval Observatory Flagstaff Station during the years 1992-1994, employing techniques developed by D. Monet and described in Monet and Monet (1992). " Some less-accurate CCD data from the JPL Table Mountain Facility (Owen, 1995) were also employed. After the development of E5, additional CCD data from Flagstafffor the years 1995 and 1996 were obtained. They serve as a good indicator of the stability of the E5 ephemerides.

The fit has been performed in the following way. The Euler angles provided by DE245 have been converted to variables PI, P2, T by using the parameters ¢> and c and the mean mean longitude WI fitted to DE245 (sect. 2). Theoretical values of PI, P2, T have been obtained by substituting both DE245 values of the gravitational and tidal parameters, and lunar arguments fitted to DE245 in the forced part of the theory. The differences have been treated by frequency analysis over a time span of three centuries from 1750 to 2050.

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