Assertion: moon's distance | /r/HasProperty | up to 180,000 km
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text: An intense search conducted by New Horizons confirmed that no moons larger than 4.5 km in diameter exist out to a distances up to 180,000 km from Pluto (6% of the stable region for prograde moons), assuming Charon-like albedoes of 0.38 (for smaller distances, this threshold is still smaller).