Basic data for Pluto

Basic data for Pluto

Table
Basic data for Pluto
mean distance from Sun 5,910,000,000 km (39.5 AU)
eccentricity of orbit 0.251
inclination of orbit to ecliptic 17.1°
Plutonian year (sidereal period of revolution) 247.69 Earth years
visual magnitude at mean opposition 15.1
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 3
*Time required for Pluto to return to the same position in the sky relative to the Sun as seen from Earth.
**Smallness of deviation from sidereal day is due to Pluto's huge orbit.
See as table:

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Universalium. 2010.

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