Presentation #523.03 in the session Observing and Modeling NEO Properties (iPosters).
To better understand near-Earth asteroid 2100 Ra-Shalom’s thermophysical properties, we utilized the shape-based thermophysical model, SHERMAN . This thermophysical model allows the user to derive the thermal properties in the near-infrared and thermal wavelength regions while self-consistently treating the reflected spectrum at optical wavelengths. In a previous study , we constrained this model with spectra (0.7- 5.1 μm) obtained at NASA’s Infrared Telescope Facility (IRTF) from August 2019-September 2019 along with delay-Doppler images and continuous wave (CW) spectra from Arecibo Observatory. We found a consistent set of parameters for all five nights of near-IR observations. They include a thermal inertia range of 500-800 J m-2 s-0.5 K-1, an albedo range of 0.13 ± 0.03, and a crater fraction of 0.30. For the current study, we test whether this thermophysical model can reproduce the observed flux in the mid-infrared. Mid-infrared data covering 8-13 μm were obtained from  and . Preliminary results show an offset within the parameter space between the best-fitting mid-infrared models and those for the near-IR spectra. We will discuss possible explanations for this offset and explore the implications.
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