556 Phyllis is a minor planet orbiting the Sun.

It is an S-type asteroid with a diameter of 38 km and a geometric albedo of 0.185.

Based on photometric observations between 1998 and 2006, it has a synodic rotation period of 4.293 ± 0.001 hours.

[2] The asteroid is named after Phyllis, a character in Greek mythology.

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