Origin of name
Pluto is named after the Greek god of the underworld.
Once considered to be the ninth planet in the Solar System, Pluto was reclassified as a dwarf planet in 2006.
|Property||Unit||Value||Earth = 1|
|Surface gravity at equator||ms-2||0.58||0.059|
|Number of natural satellites||3|
|Mean distance from the Sun (x106)||km||5900.1|
|Mean distance from the Sun||AU||39.44|
|Sidereal orbit period||y||247.68|
|Sidereal rotation period||h||R 153.293|
|Length of day||h||153.282|
|Orbit inclination to Ecliptic||°||17.16|
|Mean orbital velocity||kms-1||4.72|
|Maximum orbital velocity||kms-1||6.10|
|Minimum orbital velocity||kms-1||3.71|
Sidereal orbit period
The time taken by the planet to complete exactly one orbit around the Sun with respect to the celestial sphere.
Sidereal rotation period
The time in which the planet rotates around its axis exactly 360° with respect to the celestial sphere.
Length of a day
Defined as the time between two successive sunrises over the meridian.
Magnetic dipole moment
Calculated as the ratio of the magnetic field strength at the equator divided by the cube of the equatorial radius.