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  • Print publication year: 2012
  • Online publication date: December 2012

6 - Celestial mechanics of the N-body problem

from Part II - Foundations of astrometry and celestial mechanics



The dynamics of celestial bodies is an important topic for astrometry. First, as we have seen in the previous chapter, the position and velocity of the observer with respect to the BCRS as well as the positions and velocities of Solar System objects are necessary to reduce observations for aberration, parallax, and gravitational light deflection. Second, astrometric observations represent an important source of information allowing us to model the dynamical behavior of various celestial systems: Earth satellites, interplanetary stations, major and minor planets of the Solar System, binary and multiple stars, exoplanetary systems, etc.

A modern introduction in the various techniques of celestial mechanics can be found in the books of Murray and Dermott (1999), Beutler (2005) and Roy (2005). In this chapter we give a short overview of the most important results and concentrate on the practical aspects of the N-body problem relevant to obtaining and processing high-accuracy astrometric data.

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