Table 3
Estimation of the degree 2 gravity coefficients C20 and C22 of the five inner small satellites selected.
| Body | Atlas | Epimetheus | Janus | Pandora | Prometheus |
|---|---|---|---|---|---|
| C20 La19 | – | −0.0554 | −0.0924 | −0.1459 | −0.2579 |
| C20 SH nominal | −0.2804 | −0.0718 | −0.0978 | −0.1430 | −0.2370 |
| C20 SH | −0.311 ± 0.017 | −0.0730 ± 0.0023 | −0.0977 ± 0.0020 | −0.1435 ± 0.0048 | −0.250 ± 0.012 |
| C22 Lal9 | – | 0.0137 | 0.0106 | 0.0322 | 0.0786 |
| C22 SH nominal | 0.0153 | 0.0317 | 0.0131 | 0.0347 | 0.0772 |
| C22 SH | 0.0164 ± 0.0082 | 0.0315 ± 0.0018 | 0.0125 ± 0.0011 | 0.0337 ± 0.0032 | 0.0802 ± 0.0051 |
Notes. The reference radii used for the gravity coefficients are taken from Thomas & Helfenstein (2020). Here, Lal9 is referred to Lainey et al. (2019) and SH is Spherical Harmonics. The nominal values correspond to spherical harmonics computed directly from the shape model of Thomas & Helfenstein (2020) and the third line corresponds to the solutions (mean and standard deviation) coming from the Monte Carlo computation.
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