THIS CACHE IS NOT HIDDEN AT THE LISTED COORDINATES
While no planet in our solar system is the colour purple, several planets can appear violet under certain conditions while several others may show blue-violet hues due to their atmospheric methane.
The name of one planet [correctly entered] that fits into one of these categories will unlock the checker. This planet is located thirty times further from the sun than Earth, has sixteen known moons and takes one hundred and sixty five earth years for a single orbit of the Sun. Enter the name of this planet in reverse order for the checker.
You can validate your puzzle solution with
certitude.