If I get this right, then the circumference of such a massive circle is so large that the difference a single meter makes is negligible in terms of the number of decimal places of ππrequired. Even the standard value of π used in most scientific calculations (around 15-20 decimal places) would be vastly more precise than necessary for this purpose. Beyond a certain point, additional precision in the value of π does not contribute significantly to the accuracy of calculations for real-world distances, even on an astronomical scale.