The polar motion and the draconitic period

Details The polar motion and the draconitic period The polar motion and the draconitic period

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jsrs.meet..218m&link_type=abstract

"Proceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor:

Computer Science

Scientific paper

The main topic of this paper is to study how an average of the periods belonging to the circular components of the polar motion (Chandler’s wobble) can be determined and its supervision through a connection with the period of the lunar precession. There is an average period of the polar circular periods, well determined, using the synodic polar periods as weights. These ones are offering to the determined medium polar period, precision and stability. There is an empirical connection between the equation of the eclipses’ year (the draconitic year) and the medium circular polar period, determined on the basis of the polar synodic periods, whose accuracy is offered by the proximity of its value to 435.4 days. We propose the following equation: 1/T = 1/435.42 z + 4/T2 and 1/T1 = 1/435.42z + 3/T2, derived from the equation of the draconitic year (the eclipses’ year) 1/T= 1/T1 + 1/T2.

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