Key Facts


202421 (2005 UQ513) is a dwarf planet whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2005 UQ513 as potentially hazardous because its orbit does not bring it close to Earth.

2005 UQ513 orbits the sun every 105,000 days (287.47 years), coming as close as 37.45 AU and reaching as far as 49.73 AU from the sun. Based on its brightness and the way it reflects light, 2005 UQ513 is probably between 437.074 to 977.327 kilometers in diameter, making it one of the largest objects, very roughly comparable in size to Japan.

The rotation of 2005 UQ513 has been observed. It completes a rotation on its axis every 7.03 hours.

No Close Approaches

2005 UQ513's orbit is 36.50 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

2005 UQ513's orbit is determined by observations dating back to Sept. 15, 1990. It was last officially observed on Oct. 26, 2021. The IAU Minor Planet Center records 724 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 2005 UQ513:



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Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 43.59 AU
  • Eccentricity: 0.1408
  • Inclination: 25.7°
  • Longitude of Ascending Node: 307.6°
  • Argument of Periapsis: 220.27°
  • Mean Anomaly: 233.72°

Physical Characteristics

  • Diameter: ~564.260 km
  • Magnitude: 3.92

Derived Characteristics

  • Orbit Period: 105,000 days (287.47 years)
  • Avg. Orbit Speed: 4.52 km/s
  • Aphelion Distance: 49.73 AU
  • Perihelion Distance: 37.45 AU
  • Rotation Period: 7.03 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 202421 (2005 UQ513) 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.