13491 (1984 UJ1)

Mid-sized Main-belt Asteroid

Space Reference » Main-belt Asteroids » 13491 (1984 UJ1)

Key Facts

Overview

13491 (1984 UJ1) is a mid-sized asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified 1984 UJ1 as potentially hazardous because its orbit does not bring it close to Earth.

1984 UJ1 orbits the sun every 1,310 days (3.59 years), coming as close as 1.78 AU and reaching as far as 2.91 AU from the sun. Based on its brightness and the way it reflects light, 1984 UJ1 is probably between 2.914 to 6.517 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the island of Manhattan.

The rotation of 1984 UJ1 has been observed. It completes a rotation on its axis every 3.12 hours.

No Close Approaches

1984 UJ1's orbit is 0.78 AU from Earth's orbit at its closest point. This means that there is a very 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

1984 UJ1's orbit is determined by observations dating back to Oct. 26, 1984. It was last officially observed on June 17, 2023. The IAU Minor Planet Center records 2,033 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 1984 UJ1:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.344 AU
  • Eccentricity: 0.2412
  • Inclination: 6.26°
  • Longitude of Ascending Node: 28.57°
  • Argument of Periapsis: 351.29°
  • Mean Anomaly: 306.07°

Physical Characteristics

  • Diameter: ~3.763 km
  • Magnitude: 14.8

Derived Characteristics

  • Orbit Period: 1,310 days (3.59 years)
  • Avg. Orbit Speed: 19.47 km/s
  • Aphelion Distance: 2.91 AU
  • Perihelion Distance: 1.78 AU
  • Rotation Period: 3.12 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 13491 (1984 UJ1) 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 1984 UJ1 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.