Key Facts


2001 HA59 is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2001 HA59 as potentially hazardous because its orbit does not bring it close to Earth.

2001 HA59 orbits the sun every 107,000 days (292.95 years), coming as close as 41.47 AU and reaching as far as 46.55 AU from the sun. Based on its brightness and the way it reflects light, 2001 HA59 is probably between 133.216 to 297.879 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Massachusetts.

No Close Approaches

2001 HA59's orbit is 40.50 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

2001 HA59's orbit is determined by observations dating back to April 26, 2001. It was last officially observed on May 29, 2016. The IAU Minor Planet Center records 13 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 2001 HA59:



   or view a random object

Orbital Elements

  • Epoch: 2459200.5 JD
  • Semi-major axis: 44.01 AU
  • Eccentricity: 0.0577
  • Inclination: 1.01°
  • Longitude of Ascending Node: 149.25°
  • Argument of Periapsis: 310.98°
  • Mean Anomaly: 134.89°

Physical Characteristics

  • Diameter: ~171.981 km
  • Magnitude: 6.5

Derived Characteristics

  • Orbit Period: 107,000 days (292.95 years)
  • Avg. Orbit Speed: 4.47 km/s
  • Aphelion Distance: 46.55 AU
  • Perihelion Distance: 41.47 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2001 HA59 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.