The story
From Sadko + crater. Named after the mythic character Sadko (Садко (Sadko)) from a Russian epic poem (a bylina (были́на (bylína)), who journeys to the bottom of the sea.
Etymology from Wiktionary, CC BY-SA 4.0.
Sadko Crater
Today it means: A crater (impact feature) on Charon, the moon or binary companion of the dwarf planet Pluto. Full definition →