a) The best hollow cone model, filling the estimated P/2010 A2 dust envelope (red). This model consisted of a cone with an opening angle α_c = 40°, pointing downward at φ_A2 = −20° and forward at θ_A2 = 74°, with a maximum dust velocity v_dmax = 0.2 ms^-1. The central streak is the zero-velocity component of the dust distribution. b) A hollow cone model with a thin cone α_c = 10° and φ_A2 = −30°. Many thin cone models pointing downward successfully fill the bottom part of the envelope, but do not account for the top. c) A hollow cone model with a thin cone α_c = 10° and φ_A2 =  + 10°. Models with φ_A2 =  >0° tend to fill or overfill the top part of the envelope, but leave the bottom part empty. d) A broad cone with α_c = 80° and φ_A2 = −20° tends to overfill the envelope, producing a spur on the left, and fails to match the top contour of the envelope. e) A broad cone α_c = 60° pointing downward at φ_A2 = −80°. Models with φ_A2 =  < −50° tend to produce east projecting dust, and very broad cones tend to overfill the envelope at some points in order to fill it at others.