Key Facts


Pelion is a large asteroid with an orbit between Jupiter and Neptune. NASA JPL has not classified Pelion as potentially hazardous because its orbit does not bring it close to Earth.

Pelion orbits the sun every 32,800 days (89.80 years), coming as close as 17.39 AU and reaching as far as 22.75 AU from the sun. Based on its brightness and the way it reflects light, Pelion is probably between 22.313 to 49.893 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Indianapolis.

No Close Approaches

Pelion's orbit is 16.40 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

Pelion's orbit is determined by observations dating back to Aug. 21, 1998. It was last officially observed on Sept. 29, 2017. The IAU Minor Planet Center records 101 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.



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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 20.07 AU
  • Eccentricity: 0.1333
  • Inclination: 9.35°
  • Longitude of Ascending Node: 126.82°
  • Argument of Periapsis: 155.05°
  • Mean Anomaly: 122.89°

Physical Characteristics

  • Diameter: ~28.806 km
  • Magnitude: 10.38

Derived Characteristics

  • Orbit Period: 32,800 days (89.80 years)
  • Avg. Orbit Speed: 6.66 km/s
  • Aphelion Distance: 22.75 AU
  • Perihelion Distance: 17.39 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Pelion is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.