Original: It is likely the sixth most massive asteroid after Ceres, Vesta, Pallas, Hygiea, and 511 Davida with a mass estimated to be 1.2% of the mass of the entire asteroid belt.
Simplified: It is the fifth most heaviest asteroid after Ceres, Vesta, Pallas and Hygiea with a mass thought to be 2.0% of the mass of the whole asteroid belt.