This is part of a whole solar-system model that spans central Florida.
The Sun in this model is defined to be the dome of the fountain in the middle of Lake Eola Park in Orlando, Florida. The fountain is 18m in diameter⁘. The star it represents is 864,300 mi in diameter⁘. That yields a ratio of 1:77,333,000.
The sun is 99.86% of the mass of the whole solar system!