Pluto - The 9th Planet
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Facts & Figures

The Planet Pluto as imaged by The Hubble Space Telescope

The planet Pluto was not discovered until after the advent of the telescope.

 

  • Brightness at Opposition (max) +13.6 (min) +15.95
  • Distance from Earth (max) 51.30 AU (min) 28.63 AU
  • Mass 1.290 x 1022kg  (0.002 x Earth)
  • Size 2320 km @ Equator  (0.182 x Earth)
  • Distance from Sun (max) 50.29 AU (min) 29.64 AU
  • Orbital Period 248.54 years
  • Temperature (min) -240C (max) -218


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