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Table 4
Physical and orbital characteristics used for the stability calculations and results.
| Mercury | Venus | Earth | Early Earthb | |||
|
|
||||||
| M (×10-24 kg) | 0.330 | 4.87 | 5.98 | 5.98 | ||
| R (km) | 2440 | 6051 | 6378 | 6378 | ||
| Tspin (d) | 58.6 | −243 | 0.997 | 0.418 | ||
| Torb (d) | 87.97 | 224.7 | 27.32 | 9.67b | ||
| Tidal amplitude (m) | 0.925a | 1.8 | 0.6 | 3.4 | ||
| R2/R | 0.8a | 0.17 | 0.55 | 0.55 | ||
| η | 0 | 0 | 0.35 | 0 | ||
| E (×1014) | 21 | 316 | 0.11 | 0.047 | ||
| β (measured) (×107) | 7.6 | ? | 1.9 | 11 | ||
| β (hydrostatic) (×107) | 6.8 | 1.1 | 0.8 | 6.7 | ||
| Bsufc (nT) | 250d | 30 | 3 × 104 | 0 | ||
| B0e (nT) | 488 | 6100 | 1.8 × 105 | 0 | ||
| Λ | 6.4 × 10-6 | 0.004 | 0.015 | 0 | ||
| σ (years-1) | −1.5 × 10-5 | −5.43 | −7.7 | 0.003 | ||
Notes. Following Herreman et al. (2009), we take as typical values σe = 4 × 105 S m-1, ρ0 = 12 000 kg m-3 and ν = 10-6 m2 s-1, consistent with a Fe/Fe-S composition.
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