Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the U.S. Capitol building
  • Will pass within 19,388,576 km of Earth in 2033
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

163023 (2001 XU1) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2001 XU1 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.

2001 XU1 orbits the sun every 260 days (0.71 years), coming as close as 0.36 AU and reaching as far as 1.23 AU from the sun. Based on its brightness and the way it reflects light, 2001 XU1 is probably between 0.367 to 0.820 kilometers in diameter, making it small in absolute terms, but larger than 90% of asteroids, very roughly comparable in size to the U.S. Capitol building.

Close Approaches

2001 XU1's orbit is 0.06 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.

2001 XU1 has 20 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Nov. 28, 2033 19,388,576 22.251
Nov. 27, 2038 9,928,498 20.113
Nov. 27, 2043 10,126,982 18.439
Nov. 28, 2048 18,561,623 17.165
Dec. 1, 2053 27,922,360 16.412
Nov. 30, 2075 27,907,569 24.004
Nov. 28, 2080 16,221,705 21.602
Nov. 27, 2085 8,502,986 19.597
Nov. 27, 2090 12,115,531 18.037
Nov. 29, 2095 21,151,981 16.920
Dec. 1, 2122 24,858,175 23.416
Nov. 29, 2127 13,619,507 21.081
Nov. 28, 2132 8,110,886 19.190
Nov. 29, 2137 14,047,013 17.711
Dec. 1, 2142 23,457,951 16.704
Nov. 30, 2169 21,677,057 22.780
Nov. 29, 2174 11,152,254 20.563
Nov. 29, 2179 8,676,202 18.784
Nov. 29, 2184 16,389,965 17.410
Dec. 2, 2189 26,004,327 16.524

Images and Observations

2001 XU1's orbit is determined by observations dating back to Nov. 23, 2001. It was last officially observed on Jan. 21, 2019. The IAU Minor Planet Center records 324 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 2001 XU1:

References

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Orbital Elements

  • Epoch: 2455701.5 JD
  • Semi-major axis: 0.7974 AU
  • Eccentricity: 0.5463
  • Inclination: 27.16°
  • Longitude of Ascending Node: 69.73°
  • Argument of Periapsis: 208.5°
  • Mean Anomaly: 214.09°

Physical Characteristics

  • Diameter: ~0.474 km
  • Magnitude: 19.3

Derived Characteristics

  • Orbit Period: 260 days (0.71 years)
  • Avg. Orbit Speed: 33.37 km/s
  • Aphelion Distance: 1.23 AU
  • Perihelion Distance: 0.36 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 163023 (2001 XU1) 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.