Key Facts


Ul is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Ul 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.

Ul orbits the sun every 1,110 days (3.04 years), coming as close as 1.27 AU and reaching as far as 2.93 AU from the sun. Based on its brightness and the way it reflects light, Ul is probably between 1.278 to 2.858 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

No Close Approaches

Ul's orbit is 0.28 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

Ul's orbit is determined by observations dating back to Sept. 14, 1982. It was last officially observed on April 6, 2021. The IAU Minor Planet Center records 222 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 Ul:



   or view a random object

Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 2.101 AU
  • Eccentricity: 0.3961
  • Inclination: 25.08°
  • Longitude of Ascending Node: 158.81°
  • Argument of Periapsis: 159.11°
  • Mean Anomaly: 45.68°

Physical Characteristics

  • Diameter: ~1.650 km
  • Magnitude: 16.59

Derived Characteristics

  • Orbit Period: 1,110 days (3.04 years)
  • Avg. Orbit Speed: 20.59 km/s
  • Aphelion Distance: 2.93 AU
  • Perihelion Distance: 1.27 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Ul 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 Ul 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.