Key Facts

Overview

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

Johnpearse orbits the sun every 1,710 days (4.68 years), coming as close as 2.21 AU and reaching as far as 3.38 AU from the sun. Johnpearse is about 14.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Cleveland, Ohio.

Johnpearse's spectral type None (Tholen) / Ch (SMASSII) indicates that it is likely to contain water, iron, nickel, cobalt, nitrogen, and ammonia.

No Close Approaches

Johnpearse's orbit is 1.25 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

Johnpearse's orbit is determined by observations dating back to Sept. 12, 1978. It was last officially observed on June 26, 2023. The IAU Minor Planet Center records 3,248 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 Johnpearse:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.796 AU
  • Eccentricity: 0.2078
  • Inclination: 7.66°
  • Longitude of Ascending Node: 173.22°
  • Argument of Periapsis: 268.88°
  • Mean Anomaly: 165.61°

Physical Characteristics

  • Diameter: 14.34500 km
  • Magnitude: 12.99
  • Albedo: 0.071
  • Spectral type (SMASS): Ch

Derived Characteristics

  • Orbit Period: 1,710 days (4.68 years)
  • Avg. Orbit Speed: 17.79 km/s
  • Aphelion Distance: 3.38 AU
  • Perihelion Distance: 2.21 AU
  • Approx. Composition: water, iron, nickel, cobalt, nitrogen, and ammonia.

Map Comparison

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Orbit Simulation

Sky Map

The position of Johnpearse 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.