Moons of Pluto - Table

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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