“Charon, also called (134340) Pluto I,[1] is the largest of the five known moons of the dwarf planet Pluto. It was discovered in 1978 at the United States Naval Observatory in Washington, D.C., using photographic plates taken at the United States Naval Observatory Flagstaff Station (NOFS). It is a very large moon in comparison to its parent body, Pluto. Its gravitational influence is such that the barycenter of the Pluto–Charon system lies outside Pluto.
New Horizons flew through the Pluto–Charon system on 14 July 2015, approaching to within 27,000 km (17,000 mi) of Charon.”
https://en.wikipedia.org/wiki/Charon_%28moon%29
I thought we aren’t supposed to use the word ‘dwarf’?