Table 5
Maximum differences in libration angles (converted to metres on the lunar surface) between different generations of ephemerides over 25 years.
| 2000-20230 | I17a-I13c | I19a-I17a | I19a-I21a | I19a-DE421 |
|---|---|---|---|---|
| Differences in the model and in the data span | CMB interaction + 4 yr LLR | Core shape + 2 yr LLR | +2 yr LLR | CMB interaction, core shape +11 yr LLR |
| Δψ | 3 m | 40 cm | 6 cm | 3 m |
| Δθ | 1.5 m | 15 cm | 3 cm | 50 cm |
| Δφ | 3 m | 50 cm | 10 cm | 1.6 cm |
| Offset in | 100 m | 5 cm | ||
Notes. The header notes the main differences in the dynamical model and data span between the ephemerides. The considered ephemerides are INPOP17a (I17a) (Viswanathan et al. 2018b), INPOP19a (I19a) (Fienga et al. 2019), INPOP21a (I21a) (Fienga et al. 2021), INPOP13c (I13c) (Fienga et al. 2014), and DE421 (Folkner et al. 2014a).
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