Henri Wilson wrote:

The extinction distance is directly proportional to period.
The 0.0007 value is for a period of 0.0042 years.
It becomes 0.007 for 0.042 years, 0.07 for 0.42 years..etc.
...always independent of peripheral velocity.

How can you explain THAT?

As I said 19 and 20 March, the light speed unification
distance is inversely proportional to the rate of pulse
bunching. The more rapidly the pulses bunch, the shorter
the unification distance. What you have found is the
obvious fact that the rate of pulse bunching is inversely
proportional to the period. All else being equal, the
shorter the period, the more rapidly the pulses bunch.
So naturally, the shorter the period, the shorter the
unification distance.

Leonard