Open Access
Table 1
Orbital parameters for Pluto’s moon system.
| Object | Mass (1016 kg) | Semi-major axis (km) |
|---|---|---|
| Pluto | 1 303 000 | 2126 |
| Charon | 158 600 | 17470 |
| Styx | 0.06 | 42 656 ± 78 |
| Nix | 4.5 | 48 694 ± 3 |
| Kerberos | 0.1 | 57 783 ± 19 |
| Hydra | 4.8 | 64738 ± 3 |
| Period (days) | Eccentricity (10−3) | Inclination (°) |
| 6.3872273 | 0.000 | 0.000 |
| 6.3872273 | 0.000 | 0.000 |
| 20.16155 ± 0.00027 | 5.787 ± 1.144 | 0.809 ± 0.162 |
| 24.85463 ± 0.00003 | 2.036 ± 0.050 | 0.133 ± 0.008 |
| 32.16756 ± 0.00014 | 3.280 ± 0.200 | 0.389 ± 0.037 |
| 38.20177 ± 0.00003 | 5.862 ± 0.025 | 0.242 ± 0.005 |
Notes. The semi-major axes are given with respect to the system’s center of mass. The masses are based on the results of Buie et al. (2012) and all the other parameters are adopted from Showalter & Hamilton (2015).
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