Pluto was discovered at Lowell Observatory in Flagstaff, AZ during a systematic search for a trans-Neptune planet predicted by Percival Lowell and William H. Pickering. Named after the Roman god of the underworld who was able to render himself invisible.
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Feature boundaries (polygons) are only intended for locating a specific named topographic or morphologic feature, not as precise scientific or geological unit boundaries. No geological interpretation of named features is endorsed by the IAU. Expected precision for feature coordinates is 2 decimal places. Some landing site features may be captured to 4 decimal places. The horizontal accuracy can vary largely from planetary body to body. Planetary control networks change regularly as new data is gathered, keeping pace with the latest control networks is an ongoing task for the maintainers.
For All Approved Features:
PLUTO_nomenclature_CenterPoints.zip
PLUTO_nomenclature_FeaturePolygons.zip