Density profiles needed to obtain various J₂ values. The ADAM shape is used with fixed total mass m₁ = 7.78 × 10¹⁸ kg. Left: Homogeneous body with ρ = 4.11 g cm⁻³, and nominal J₂ = 0.1590. Middle: Differentiated body with iron core + silicate mantle (ρ = 8 and 3 g cm⁻³), and slightly lower J₂ = 0.1166; the core is spherical () and the mantle irregular. Right: Extreme example with iron core + icy mantle (ρ = 8 and 1 g cm⁻³), and J₂ = 0.0423 (not realistic, however). The body is always plotted as a section with z < 0 to see its interior.