2 SEDs for OD103 with the times given in the SSF file for OD103. Fortuna has a ± 10% lightcurve variation (for the OD 103 constellation as seen by Herschel) with a rotation period of 7.44 h. This means that there is a significant flux variation during a 1 hour measurement. The absolute flux uncertainty is probably better than 10% (at the specified SED times). This is based on unpublised Akari and Spitzer-MIPS fluxes