Key Facts


Okyrhoe is a large asteroid with an orbit between Jupiter and Neptune. NASA JPL has not classified Okyrhoe as potentially hazardous because its orbit does not bring it close to Earth.

Okyrhoe orbits the sun every 8,850 days (24.23 years), coming as close as 5.82 AU and reaching as far as 10.93 AU from the sun. Okyrhoe is about 36.0 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Los Angeles.

The rotation of Okyrhoe has been observed. It completes a rotation on its axis every 9.72 hours.

No Close Approaches

Okyrhoe's orbit is 4.84 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

Okyrhoe's orbit is determined by observations dating back to Sept. 13, 1998. It was last officially observed on June 18, 2023. The IAU Minor Planet Center records 748 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 Okyrhoe:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 8.375 AU
  • Eccentricity: 0.3047
  • Inclination: 15.65°
  • Longitude of Ascending Node: 173.08°
  • Argument of Periapsis: 337.23°
  • Mean Anomaly: 234.13°

Physical Characteristics

  • Diameter: 36.00000 km
  • Magnitude: 10.93
  • Albedo: 0.058

Derived Characteristics

  • Orbit Period: 8,850 days (24.23 years)
  • Avg. Orbit Speed: 10.30 km/s
  • Aphelion Distance: 10.93 AU
  • Perihelion Distance: 5.82 AU
  • Rotation Period: 9.72 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Okyrhoe 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.