I have been studying the solar system barycentre data from the
5 day interval SSB ephemeris for the full 6000 years covered by the NASA JPL Horizons Online Ephemeris. It is a 30MB text file compressed as a 12MB ZIP file. I extracted to excel with 438309 dates showing Longitude, Radius (Sun=1), Angular Momentum and Torque for each. For my purpose I am just using the radius to analyse wave trends in the distance from the centre of mass to the position of the sun.

From this data I have charted the 179 year wave pattern from 3000BC to 0 so far. There is a clearly defined wave shape with 178.9 year average frequency throughout. My calculations for the period 2000BC to 1000BC find an average period between similar wave turning points of 178.99124 years, slightly longer than the apparent long term average. In this thousand year subset I found about 136 instances of this wave length in the SSB cycle. These instances have standard deviation 0.44 years and one third have frequency >178.9 and <179.1.

This pattern appears to be a major constant of the solar system, in that the cycles of the centre of mass provide an integrated gravitational picture of the shape of the solar system overall. Charting the data, many simple patterns leap out, for example in repeated patterns slightly shorter or longer than average wave length but with clear defined ~179 year periodicity.

My underlying question here is the effect of the SSB cycle on earth. As I have noted previously, and as is confirmed in study of the 6000 year JPL series, this SSB wave structure corresponds precisely to what is known as ‘the houses of the age,’ ie the 1/12 x 1/12 division of the 25765 year long precession of the equinox. It is hard, for me at least, to imagine that life on earth could have evolved in the midst of this intricate gravitational pattern and not reflect it in any way.