Pluto and Moon
Pluto (dwarf planet) and Moon (Earth’s natural satellite) side by side – to scale and in numbers.
| Pluto | Moon | Pluto ÷ Moon | |
|---|---|---|---|
| Diameter | 2,376 km | 3,475 km | 0.68 × |
| Mass | 1.30 × 10²² kg | 7.30 × 10²² kg | 0.18 × |
| Surface gravity | 0.70 m/s² | 1.60 m/s² | 0.44 × |
| Density | 1,850 kg/m³ | 3,340 kg/m³ | 0.55 × |
| Mean temperature | -225 °C | -20 °C | |
| Mean distance from the Sun | 5.91 billion km | 149.6 million km with Earth |
39.5 × |
| Length of day | 6.4 days | 29.5 days sunrise to sunrise |
0.22 × |
| Year (orbit around the Sun) | 247.9 years | 365.2 days (1.00 years) with Earth |
2.48 × 10² × |
| Orbit around its planet | – | 27.3 days around Earth |
|
| Known moons | 5 | – |
Data: NASA Planetary Fact Sheet, JPL SSD (planetary moons), JPL SBDB (dwarf planets) – public domain. Moon gravity is calculated from the JPL mass (GM) and radius; a moon’s “year” is its planet’s orbit around the Sun. A dash – no value in these sources.
⇄ Swap sides More about Pluto More about Moon