Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the city of Indianapolis (22.29 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

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

Eteoneus orbits the sun every 4,240 days (11.61 years), coming as close as 5.02 AU and reaching as far as 5.24 AU from the sun. Eteoneus is about 22.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

No Close Approaches

Eteoneus's orbit is 4.05 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

Eteoneus's orbit is determined by observations dating back to Jan. 8, 1989. It was last officially observed on March 13, 2023. The IAU Minor Planet Center records 2,288 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 Eteoneus:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 5.13 AU
  • Eccentricity: 0.0205
  • Inclination: 26.45°
  • Longitude of Ascending Node: 219.32°
  • Argument of Periapsis: 221.99°
  • Mean Anomaly: 355.24°

Physical Characteristics

  • Diameter: 22.28900 km
  • Magnitude: 11.49
  • Albedo: 0.098

Derived Characteristics

  • Orbit Period: 4,240 days (11.61 years)
  • Avg. Orbit Speed: 13.16 km/s
  • Aphelion Distance: 5.24 AU
  • Perihelion Distance: 5.02 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Eteoneus 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.