Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 12,688,408 km of Earth in 2021
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2002 UK11 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2002 UK11 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2002 UK11 orbits the sun every 556 days (1.52 years), coming as close as 0.56 AU and reaching as far as 2.08 AU from the sun. Based on its brightness and the way it reflects light, 2002 UK11 is probably between 0.111 to 0.248 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

The rotation of 2002 UK11 has been observed. It completes a rotation on its axis every 8.00 hours.

Close Approaches

2002 UK11's orbit is 0.01 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.

2002 UK11 has 15 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 11, 2021 12,688,408 20.286
Nov. 13, 2034 9,289,745 19.534
June 2, 2050 13,963,763 15.172
Nov. 8, 2063 25,690,838 22.940
Nov. 25, 2066 22,628,653 13.403
June 7, 2082 2,017,609 17.888
Nov. 9, 2095 23,005,901 22.370
Nov. 25, 2098 22,473,051 13.435
June 14, 2114 15,888,037 20.906
Nov. 21, 2127 8,851,821 16.226
June 14, 2143 15,491,531 20.824
Nov. 10, 2153 23,786,714 22.564
June 8, 2169 3,218,720 17.403
Nov. 17, 2182 3,566,147 18.181
June 2, 2198 20,438,282 13.898

Images and Observations

2002 UK11's orbit is determined by observations dating back to Oct. 28, 2002. It was last officially observed on June 21, 2018. The IAU Minor Planet Center records 77 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 2002 UK11:

References

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Orbital Elements

  • Epoch: 2459200.5 JD
  • Semi-major axis: 1.323 AU
  • Eccentricity: 0.5756
  • Inclination: 5.37°
  • Longitude of Ascending Node: 69.25°
  • Argument of Periapsis: 84.42°
  • Mean Anomaly: 281.1°

Physical Characteristics

  • Diameter: ~0.143 km
  • Magnitude: 21.9

Derived Characteristics

  • Orbit Period: 556 days (1.52 years)
  • Avg. Orbit Speed: 25.89 km/s
  • Aphelion Distance: 2.08 AU
  • Perihelion Distance: 0.56 AU
  • Rotation Period: 8.00 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 2002 UK11 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 below comparison is an artistic rendering that uses available data on the diameter of 2002 UK11 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.