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Table 5
Comparison of the free polar motion of Venus, Earth, Mars.
| Wobble period | Wobble amplitude | ||
|---|---|---|---|
| (years) | (arcsec) | (m) | |
| Venus | [12 900; 18 900] | 1790 ± 70 | 52 000 ± 2000 |
| Earth 1 | 1.1855 ± 0.0030 | 0.15 ± 0.05 a | 5 ± 2a |
| Mars 2 | 0.5665 ± 0.0014 | 0.006 ± 0.001 | 0.10 ± 0.02 |
Notes. (a)Earth’s wobble amplitude is given here with its associated fluctuation. The current measurement uncertainty of Earth’s polar motion is 0.1 mas, or 3 mm (Bizouard 2020). References: (1)Gross (2000); (2)Konopliv et al. (2020).
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