Key Facts

Overview

Amicitia is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified Amicitia as potentially hazardous because its orbit does not bring it close to Earth.

Amicitia orbits the sun every 1,210 days (3.31 years), coming as close as 2.01 AU and reaching as far as 2.43 AU from the sun. Amicitia is about 21.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

The rotation of Amicitia has been observed. It completes a rotation on its axis every 5.06 days.

No Close Approaches

Amicitia's orbit is 1.02 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

Amicitia's orbit is determined by observations dating back to March 28, 1906. It was last officially observed on Dec. 27, 2019. The IAU Minor Planet Center records 2,760 observations used to determine its orbit.

Scientists have been able to determine this object's shape.

View asteroid Amicitia in 3D.

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 Amicitia:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 2.219 AU
  • Eccentricity: 0.0963
  • Inclination: 2.94°
  • Longitude of Ascending Node: 83.45°
  • Argument of Periapsis: 55.79°
  • Mean Anomaly: 240.83°

Physical Characteristics

  • Diameter: 21.24300 km
  • Magnitude: 10.7
  • Albedo: 0.393

Derived Characteristics

  • Orbit Period: 1,210 days (3.31 years)
  • Avg. Orbit Speed: 19.95 km/s
  • Aphelion Distance: 2.43 AU
  • Perihelion Distance: 2.01 AU
  • Rotation Period: 5.06 days

Size Comparison

Orbit Simulation

Sky Map

The position of Amicitia 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.