Apart from "OCTANT HUGGING", There are two further INEXPLICABLE features relating to the movements of Solar System bodies. A cash prize of £32,000 is offered for an explanation of the first item (using only the laws of Newtonian Physics), and a £500 cash prize for the second item.  Here is the first item now, and you can scroll down this page to see the second item. Also, for  still more INEXPLICABLE Solar System features, click on the following links:-

solar-system-formation   

and also:-

mars-satellites 

The Sun somehow "forces" or "influences" Inner Solar System bodies to revolve and rotate with specific periods, so that ratios between these periods and The Sun's rotation period SUM to very close-to-perfect WHOLE NUMBERS. There are no known laws of physics that can explain why this happens. Four examples are provided below (but I have many more similar examples available). 

 THE SUN AND INNER SOLAR SYSTEM BODIES.

The Four Inner Solar System Planets are:- Mercury, Venus, Earth, and Mars. Periods expressed in Earth days. Ratios are forward ratios (ie:- larger value divided by smaller value).