540 Rosamunde is an S-type asteroid[1] belonging to the Flora family in the Main Belt.

[3] Its diameter is about 19 km and it has an albedo of 0.243 [2].

Its rotation period is 9.336 hours[3].

Rosamunde is named for a character in a play of the same title for which Franz Schubert wrote incidental music.

This article about an S-type asteroid native to the asteroid belt is a stub.