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Table 3
Systematic effects on the Earth orientation parameters after one century from J2000.0.
| Catalog | ΔX | ΔY | Δ(ERA − s) | dΔX/dt | dΔY/dt | dΔ(ERA − s)/dt |
|
|
||||||
| ICRF1 def | 20.0 ± 8.0 | 107.1 ± 8.1 | −18.5 ± 9.4 | 0.20 ± 0.08 | 1.07 ± 0.08 | −0.16 ± 0.09 |
| ICRF1 | 3.3 ± 4.9 | 22.1 ± 5.0 | −4.0 ± 4.9 | 0.03 ± 0.05 | 0.22 ± 0.05 | −0.04 ± 0.05 |
| ICRF2 def | 14.4 ± 7.1 | 0.7 ± 5.2 | −28.0 ± 7.3 | 0.14 ± 0.07 | 0.01 ± 0.05 | −0.28 ± 0.07 |
| ICRF2 | 7.8 ± 2.1 | 88.9 ± 2.2 | −4.6 ± 2.2 | 0.08 ± 0.02 | 0.89 ± 0.02 | −0.04 ± 0.02 |
Notes. The derivatives of the corrections are derived from linear fits to the series of ΔX, ΔY, and Δ(ERA − s) over ± 500 years. The corrections and their derivatives are in the unit of μas and μas yr-1, respectively.
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