Total particulate mass in Enceladus plumes and mass of Saturn's E ring inferred from Cassini ISS images

► Total mass of ice in plumes is (1.45 ± 0.50) × 105 kg. ► Large ice/vapor ratio (0.35-0.70) implies a liquid water source for plumes. ► Particulate mass leaves the vents at (51 ± 18) kg s−1. ► Fraction that escape Enceladus ∼9%. ► Average lifetime of particles in E ring ∼8 years.