Observed SED of HD 101584, and a comparison with the model results. ISO SWS and Herschel/SPIRE spectra are shown by the full violet and brown lines, respectively (note the presence of high-J CO linesin the SPIRE spectrum). Photometric measurements are from Gaia (blue x:s), 2MASS (green pentagons), AKARI (orange circles), IRAS (black squares), WISE (red crosses), ALMA (purple circle), PACS (blue triangles), and ArTeMiS (orange inverted triangle). The red solid line represents a black-body at a temperature of 8500 K, and for a distance of 1 kpc the luminosity is 1600 L_⊙. We show models with a_max = 1 mm (M_d = 10⁻² M_⊙, green dashed line), a_max = 0.1 mm (M_d = 4 × 10⁻³ M_⊙, blue dash-dotted line), and a_max = 0.01 mm (M_d = 10⁻³ M_⊙, orange dotted line).