Key Facts

Overview

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

Jiri orbits the sun every 2,090 days (5.72 years), coming as close as 2.97 AU and reaching as far as 3.43 AU from the sun. Jiri is about 15.4 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Baltimore.

No Close Approaches

Jiri's orbit is 2.02 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

Jiri's orbit is determined by observations dating back to Sept. 30, 1980. It was last officially observed on May 21, 2023. The IAU Minor Planet Center records 2,156 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 Jiri:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 3.2 AU
  • Eccentricity: 0.0704
  • Inclination: 16.16°
  • Longitude of Ascending Node: 63.25°
  • Argument of Periapsis: 262.31°
  • Mean Anomaly: 202.27°

Physical Characteristics

  • Diameter: 15.41500 km
  • Magnitude: 13.08
  • Albedo: 0.045

Derived Characteristics

  • Orbit Period: 2,090 days (5.72 years)
  • Avg. Orbit Speed: 16.66 km/s
  • Aphelion Distance: 3.43 AU
  • Perihelion Distance: 2.97 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Jiri 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.