Left: a toy model of β = 0 debris ejection at φ_A2 = −20°,θ_A2 = 74°. An excess of ejecta at a velocity of 14 to 22 cm s^-1 has been used to create the elliptical band inside the cone, resembling one of the features of the data. To illustrate a mechanism by which the oberved curvature might be produced, the cone tapers from a width of α_c = 40° at its outer extreme velocity of 35 cm s^-1 to a width of α_c = 33° at its inner velocity of 0 cm s^-1. The boundaries of the cone are brightened by edge effects, and correspond very roughly to the other main feature of the data. Right: the 29 Jan. 2010 HST image, for comparison. The model for the second (degenerate) solution at θ_A2 ≈ −5° appears similar.