Pluto

Pluto is the 9th planet in the Solar System.

It has 1 moon (Charon). Although officially designated a planet by the IAU, some authorities claim that this should be regarded as the largest in a group of minor planets known as Kuiper Belt Objects. Don't confuse Pluto's moon with Chiron, a minor planet which orbits the Sun between Saturn and Uranus.

Orbital Parameters

Mean Distance from Sun 5,900 million km

39.5 AU

Maximum Distance from Sun 7,375 million km

49.28 AU

Minimum Distance from Sun 4,425 million km

29.65 AU

Sidereal Period (year) 247.7 Earth-years

90,465 Earth-days

Synodic Period 366.7 Earth-days
Rotational Period (day) 6d 9h 17s Earth-time
Mean Orbital Velocity 4.7 km/sec
Orbital Inclination 17º 09'
Axial inclination 122º 28'

Physical Parameters

Diameter 2,324 kilometres
Mass 0.0022 x Earth
Volume 0.056 x Earth
Escape Velocity 1.18 kilometres per second
Mean surface temperature -220ºC

Links

ALPHASTRO: Bringing The Universe To Your Desktop

Alphastro aims to present an up-to-date view of the Universe using specially written web pages and links to other Internet sites that are regularly updated. In addition to providing the latest facts, Alphastro is building up a search tool of Internet resources about astronomy and spaceflight.

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