Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the U.S. state of Delaware (97.66 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

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

Antenor orbits the sun every 4,280 days (11.72 years), coming as close as 5.08 AU and reaching as far as 5.23 AU from the sun. Antenor is about 97.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Delaware.

The rotation of Antenor has been observed. It completes a rotation on its axis every 7.96 days.

Antenor's spectral type D (Tholen) / None (SMASSII) indicates that it is likely to contain water.

No Close Approaches

Antenor's orbit is 4.10 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

Antenor's orbit is determined by observations dating back to March 11, 1959. It was last officially observed on June 16, 2020. The IAU Minor Planet Center records 3,098 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 Antenor:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 5.157 AU
  • Eccentricity: 0.0148
  • Inclination: 6.8°
  • Longitude of Ascending Node: 159.07°
  • Argument of Periapsis: 310.12°
  • Mean Anomaly: 135.74°

Physical Characteristics

  • Diameter: 97.65800 km
  • Magnitude: 8.9
  • Albedo: 0.051
  • Spectral type (Tholen): D

Derived Characteristics

  • Orbit Period: 4,280 days (11.72 years)
  • Avg. Orbit Speed: 13.11 km/s
  • Aphelion Distance: 5.23 AU
  • Perihelion Distance: 5.08 AU
  • Rotation Period: 7.96 hours
  • Approx. Composition: water.

Map Comparison

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Orbit Simulation

Sky Map

The position of Antenor 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.