Excess emission from HIP 92043 plotted with the scaled emission profiles of various standard materials for two grain sizes, 10 μm and 1 mm, at a distance of 130 AU. Fluxes are photosphere and 70 μm dust component subtracted (as described in the text). Error bars on the measurements are 1-σ. It can be seen that the disc should be composed of large, icy (or low optical absorption) and cold grains.