Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the city of Indianapolis (27.94 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

15521 (1999 XH133) is a large asteroid that shares Jupiter's orbit around the sun. NASA JPL has not classified 1999 XH133 as potentially hazardous because its orbit does not bring it close to Earth.

1999 XH133 orbits the sun every 4,390 days (12.02 years), coming as close as 4.88 AU and reaching as far as 5.61 AU from the sun. 1999 XH133 is about 27.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

The rotation of 1999 XH133 has been observed. It completes a rotation on its axis every 50.20 hours.

No Close Approaches

1999 XH133's orbit is 3.88 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

1999 XH133's orbit is determined by observations dating back to April 16, 1955. It was last officially observed on Jan. 13, 2023. The IAU Minor Planet Center records 1,754 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 1999 XH133:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 5.246 AU
  • Eccentricity: 0.0702
  • Inclination: 10.68°
  • Longitude of Ascending Node: 10.4°
  • Argument of Periapsis: 170.35°
  • Mean Anomaly: 281.8°

Physical Characteristics

  • Diameter: 27.94100 km
  • Magnitude: 11.35
  • Albedo: 0.082

Derived Characteristics

  • Orbit Period: 4,390 days (12.02 years)
  • Avg. Orbit Speed: 13.00 km/s
  • Aphelion Distance: 5.61 AU
  • Perihelion Distance: 4.88 AU
  • Rotation Period: 50.20 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 15521 (1999 XH133) 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.