Table 2
Thermal parameters and sources.
| Parameter | Value | Source |
|---|---|---|
| Albedo | 0.014 | [1] |
| Emissivity | 0.97 | [2] |
| Bulk density | 1190 kg m−3 | [3] |
| Specific heat capacity | 1000 J kg−1 K−1 | [4] |
| Thermal conductivity | 0.07563Wm−1K−1 | [5] |
Notes. [1] Ishiguro et al. (2014); [2] Hamm et al. (2022); [3] Nakamura et al. (2022); [4] Osako et al. (2010, at 300 K); [5] Ishizaki et al. (2023). Heat capacity of serpentine was used, which is a major component in the matrix of sampled Ryugu particles (Nakamura et al. 2022). Thermal conductivity is at the very low end of measured vacuum thermal conductivity of Ishizaki et al. (2023), but it was chosen to equate to a thermal inertia of 300 J m−2 K−1 s−1/2, which Okada et al. (2020) gave as the best-fitting value for their simulations.
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