4492 Debussy is a main belt asteroid. It was discovered on 17 September 1988 by Eric Elst. It is named after the French composer Claude Debussy. It is believed to measure approximately 10 km in diameter.
On 21 March 2004 it was announced that lightcurve observations indicate the presence of a moon orbiting Debussy at a distance of between 5.2 and 13.5 km. Its provisional name is S/2004 (4492) 1.