Re: What Complex Maths?
Hello Mark -
You seemed to have missed them completely. The observable sky is not a constant, and that 6,000 degrees you mention was PER PERIOD OF TIME.
NEOs fly into and out of the range available to any ground based system, and will continue to do so. Observing them thus depends on their reflectivity, angle of light incidence, distance, sky conditions, and the amount of time spent trying to observe them.
ep