Styx and Moon
Styx (moon of Pluto) and Moon (Earth’s natural satellite) side by side – to scale and in numbers.
| Styx | Moon | Styx ÷ Moon | |
|---|---|---|---|
| Diameter | 10.4 km | 3,475 km | 2.99 × 10⁻³ × |
| Mass | – | 7.30 × 10²² kg | |
| Surface gravity | – | 1.60 m/s² | |
| Density | – | 3,340 kg/m³ | |
| Mean temperature | – | -20 °C | |
| Mean distance from the Sun | 5.91 billion km with Pluto |
149.6 million km with Earth |
39.5 × |
| Length of day | – | 29.5 days sunrise to sunrise |
|
| Year (orbit around the Sun) | 247.9 years with Pluto |
365.2 days (1.00 years) with Earth |
2.48 × 10² × |
| Orbit around its planet | 20.2 days around Pluto |
27.3 days around Earth |
0.74 × |
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 Styx More about Moon