Info

mean synodic period*

366.74 Earth days

mean orbital velocity

4.72 km/s

radius

1,172 km

mass

1.2 x 1022 kg

mean density

about 2 g/cm3

mean surface gravity

58 cm/s

escape velocity

1.1 km/s

rotation period (Plutonian sidereal day)

6.3873 Earth days (retrograde)

Plutonian mean solar day**

6.3874 Earth days

inclination of equator to orbit (obliquity)

120°

mean surface temperature

about 40 K (-387 °F, -233 °C)

surface pressure (near perihelion)

about 10-5 bar

number of known moons

0 0

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