Observed spectral energy distribution of HD 100546 compared to our best-model prediction (full black line, T_eff = 10 500 K, 26 L_⊙, A_v = 0.2, R_v = 5.5). The photosphere is shown as a red line. The photometric data used in B10 are represented by black dots. The binned FUSE spectrum is plotted with red dots, the binned IUE spectrum with blue dots, the archival ISO data are plotted with cyan dots for ISO-PHOT, green dots for ISO-SWS, and magenta dots for ISO-LWS. The IRAS-LRS data are represented by yellow dots.