(89) Julia. The SAGE model provided a formally acceptable fit to the data (see Table A.1) but the optimum thermal inertia (150 SI units) is higher than expected for such a large main-belt asteroid. It is probably an artefact and manifests itself in the strong slope in the wavelength plot. The bias could be caused by two possible factors: We did not consider the dependence of thermal inertia with temperature (see e.g., Marsset et al. 2017; Rozitis et al. 2018) and the data were taken over a wide range of heliocentric distances; the thermal inertia is not well constrained because we have very few observations at positive phase angles.
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