What is the composition of phoebe?

Phoebe, one of Saturn's moons, is primarily composed of water ice and rock, with a significant portion of its surface covered in a dark, carbon-rich material. Its low density suggests a porous structure, indicating that it may contain a substantial amount of empty space or ice. Phoebe's surface features include craters and grooves, reflecting its impact history and geological activity. Overall, its composition reveals insights into the early solar system's formation and the materials present in the outer solar system.