• Key Information

  • Sedna

  • Type
    Dwarf Planet (Sednoid)
  • Diameter
    About 636 miles
  • Distance from Sun
    7,082,302,955 to 87,099,591,409 miles
  • Orbit Time
    11,390 years
  • Length of Day
    10.273 hours
  • Temperature
    -438 °F
  • Atmosphere
    Unknown
  • Date of Discovery
    November 14, 2003
  • Moons
    None
  • Learning Point
  • As the second most distant planet-like object in our Solar System, Sedna has some intriguing characteristics, including how red it is, and even how it came to be so distant from the sun. This has encouraged a lot of study into the possible reasons similar objects are found so far from our Sun.
  • Project
  • Draw Sedna far from the Sun.
  • Location
  • Located in
    Solar System, orbiting the Sun
  • Fun Facts
  • Sedna takes over around 11,400 years to orbit the sun, and does so at around 1 percent of the speed the Earth moves.
  • Along with Ceres, Sedna is tied as the largest planetoid not known to have a moon.
  • Images dating back 25 years before the discovery have been found showing Sedna in the photographs, but it wasn't noticed.
  • When Sedna gets to the closest point to the sun in 2076, the sun won't look like a disc, but will look like a nearby star... a point of light.