Key Facts


Ondaatje is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Ondaatje as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

Ondaatje orbits the sun every 757 days (2.07 years), coming as close as 1.27 AU and reaching as far as 1.99 AU from the sun. Based on its brightness and the way it reflects light, Ondaatje is probably between 1.226 to 2.742 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

The rotation of Ondaatje has been observed. It completes a rotation on its axis every 5.96 hours.

Ondaatje's spectral type None (Tholen) / Sr (SMASSII) indicates that it is likely to contain and .

No Close Approaches

Ondaatje's orbit is 0.25 AU from Earth's orbit at its closest point. This means that there is a 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

Ondaatje's orbit is determined by observations dating back to Dec. 29, 1983. It was last officially observed on Oct. 16, 2022. The IAU Minor Planet Center records 4,963 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 Ondaatje:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.626 AU
  • Eccentricity: 0.2209
  • Inclination: 22.64°
  • Longitude of Ascending Node: 111.46°
  • Argument of Periapsis: 167.33°
  • Mean Anomaly: 198.93°

Physical Characteristics

  • Diameter: ~1.583 km
  • Magnitude: 16.68
  • Spectral type (SMASS): Sr

Derived Characteristics

  • Orbit Period: 757 days (2.07 years)
  • Avg. Orbit Speed: 23.37 km/s
  • Aphelion Distance: 1.99 AU
  • Perihelion Distance: 1.27 AU
  • Rotation Period: 5.96 hours
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

Sky Map

The position of Ondaatje 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.

Size Rendering

The above comparison is an artistic rendering that uses available data on the diameter of Ondaatje to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.