Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the city of Houston (37.86 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

Koon is a large asteroid that shares Jupiter's orbit around the sun. NASA JPL has not classified Koon as potentially hazardous because its orbit does not bring it close to Earth.

Koon orbits the sun every 4,220 days (11.55 years), coming as close as 4.76 AU and reaching as far as 5.46 AU from the sun. Koon is about 37.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Houston.

The rotation of Koon has been observed. It completes a rotation on its axis every 17.01 hours.

No Close Approaches

Koon's orbit is 3.90 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

Koon's orbit is determined by observations dating back to Sept. 28, 1954. It was last officially observed on June 30, 2023. The IAU Minor Planet Center records 2,746 observations used to determine its orbit.

Accessibility and Exploration

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

Similar Objects

These objects have orbits that share similar characteristics to the orbit of Koon:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 5.11 AU
  • Eccentricity: 0.069
  • Inclination: 29.78°
  • Longitude of Ascending Node: 222.63°
  • Argument of Periapsis: 94.3°
  • Mean Anomaly: 28.18°

Physical Characteristics

  • Diameter: 37.86100 km
  • Magnitude: 10.94
  • Albedo: 0.071

Derived Characteristics

  • Orbit Period: 4,220 days (11.55 years)
  • Avg. Orbit Speed: 13.17 km/s
  • Aphelion Distance: 5.46 AU
  • Perihelion Distance: 4.76 AU
  • Rotation Period: 17.01 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Koon 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.