Here is a picture showing the change in the solar pulse since 1590, a decrease of rate by 0.05 years per 179 year cycle. It shows the 2010 value of 178.925 is in far more precise alignment with the precessional figure than the 600 year average (178.86) given in the opening post. Rather than the 7-8 year error suggested by my initial calculations, this gives an error of 0.3 years (0.001%) of 144 SSB cycles against a precession period of 25765 years. The hypothesis of a connection between the SSB and precession can easily be tested if data is available for the change in rate of precession.
[Massive image removed by moderator - see attachment if you're interested.]
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