Table
The Plutonian moons are listed here by orbital period, from shortest to longest. Moons massive enough for their surfaces to have collapsed into a spheroid are highlighted in light purple. Pluto has been added for comparison, for it orbits a point outside itself.
| Name (pronunciation) |
Image | Mean diameter (km) |
Mass (×1021 kg) | Semi-major axis (km) |
Orbital period (days) |
Resonance | Eccentricity | Inclination |
Magnitude (mean) | Discovery date |
||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pluto | 2,306 | 13.05 ± 0.07 | 2,035 | 6.387230 | 1:1 | 0.0022 | 0.001° | 15.1 | 1930 | |||
| Pluto I | Charon | /ˈʃærən/, /ˈkɛərən/ |
1,207 ± 3 | 1.52 ± 0.06 | 17,536 ± 3* | 6.387230 | 1:1 | 0.0022 | 0.001° | 16.8 | 1978 | |
| Pluto V | S/2012 P 1 | 10–25 | ? | 42,000 ± 2,000 | 20.2 ± 0.1 | ≈ 1:3 | ≈ 0 | ? | 27 | 2012 | ||
| Pluto II | Nix | /ˈnɪks/ | 46–137 | < 0.002 | 48,708 | 24.856 ± 0.001 | ≈ 1:4 | 0.0030 | 0.195° | 23.7 | 2005 | |
| Pluto IV | S/2011 P 1 | 13–34 | ? | ≈ 59,000 | 32.1 | ≈ 1:5 | ≈ 0 | ? | 26 | 2011 | ||
| Pluto III | Hydra | /ˈhaɪdrə/ | 61–167 | < 0.002 | 64,749 | 38.206 ± 0.001 | ≈ 1:6 | 0.0051 | 0.212° | 23.3 | 2005 | |
The maximum distance between the centers of Pluto and Charon is 19,571 ± 4 km.
Read more about this topic: Moons Of Pluto
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