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Table 3.
Precession corrections and indirect effects on nutation.
| Mass redistribution | Second order | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| This work (WB2016) (b) | (Baenas et al. 2017) | ||||||||||
| Precession (a) (mas cy−1) | Longitude rate: | −43.945 (−42.985) | −55.291 (−8.511) | −99.236 (−51.496) | |||||||
| Obliquity rate: | 0.934 (0.594) | 0 (0) | 0.934 (0.594) | ||||||||
| Relative Hd change (ppm): | +8.5 | +1.7 | +10.2 | ||||||||
| Θi | Period | Indirect effects on nutation (μas) | |||||||||
| l | l′ | F | D | Ω | (days) | Δψ (sin) | Δε (cos) | Δψ (sin) | Δε (cos) | Δψ (sin) | Δε (cos) |
| 0 | 0 | 0 | 0 | 1 | −6798.36 | −146.74 | 78.51 | −29.06 | 15.55 | −175.80 | 94.06 |
| 0 | 0 | 0 | 0 | 2 | −3399.18 | 1.77 | −0.77 | 0.35 | −0.15 | 2.12 | −0.92 |
| 0 | 1 | 0 | 0 | 0 | +365.26 | 1.25 | 0.06 | 0.25 | 0.01 | 1.51 | 0.07 |
| 0 | 0 | 2 | −2 | 2 | +182.62 | −11.23 | 4.89 | −2.22 | 0.97 | −13.46 | 5.85 |
| 0 | 0 | 2 | 0 | 2 | +13.66 | −1.94 | 0.83 | −0.38 | 0.17 | −2.33 | 1.00 |
Notes. (a) In parentheses, the deviation of the precession component from the IAU2006 value. (b) Using the Love numbers model of the Earth with oceans from Williams & Boggs (2016).
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