Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to Mount Everest (1.88 km diameter)
  • Will pass within 23,591,499 km of Earth in 2022
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

363505 (2003 UC20) is a mid-sized asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2003 UC20 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2003 UC20 orbits the sun every 252 days (0.69 years), coming as close as 0.52 AU and reaching as far as 1.04 AU from the sun. 2003 UC20 is about 1.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to Mount Everest.

Close Approaches

2003 UC20's orbit is 0.03 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.

2003 UC20 has 32 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 1, 2022 23,591,499 12.519
Nov. 2, 2023 5,252,596 7.971
Dec. 1, 2032 12,374,946 6.537
Dec. 30, 2041 9,975,032 8.202
Oct. 31, 2043 19,229,968 12.039
Jan. 1, 2051 24,345,386 12.713
Nov. 2, 2052 5,449,015 7.832
Dec. 4, 2061 12,451,957 6.525
Jan. 1, 2071 10,911,295 8.829
Oct. 30, 2072 15,826,267 11.219
Dec. 31, 2079 28,763,729 13.780
Nov. 7, 2081 7,393,366 7.097
Dec. 19, 2090 11,205,769 6.726
Nov. 1, 2092 29,370,779 14.343
Jan. 2, 2100 18,195,891 11.173
Nov. 1, 2101 7,088,355 8.929
Nov. 22, 2110 11,504,378 6.538
Dec. 29, 2119 9,759,996 7.362
Nov. 1, 2121 23,693,371 13.021
Jan. 2, 2129 22,108,120 12.167
Nov. 3, 2130 5,770,419 8.153
Nov. 27, 2139 12,209,172 6.522
Dec. 29, 2148 9,617,282 7.482
Nov. 2, 2150 23,332,543 12.947
Jan. 2, 2158 21,580,304 12.054
Nov. 3, 2159 6,003,576 8.260
Nov. 23, 2168 11,848,437 6.531
Dec. 25, 2177 10,439,975 6.923
Nov. 3, 2179 28,325,494 14.094
Jan. 3, 2187 14,365,209 10.132
Oct. 31, 2188 11,367,972 10.074
Nov. 11, 2197 8,847,280 6.858

Images and Observations

2003 UC20's orbit is determined by observations dating back to Dec. 5, 1954. It was last officially observed on Nov. 18, 2019. The IAU Minor Planet Center records 471 observations used to determine its orbit.

Accessibility and Exploration

2003 UC20 can be reached with a journey of 322 days. This trajectory would require a delta-v of 11.852 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 23 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2003 UC20.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2003 UC20:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.7812 AU
  • Eccentricity: 0.3369
  • Inclination: 3.8°
  • Longitude of Ascending Node: 188.4°
  • Argument of Periapsis: 59.7°
  • Mean Anomaly: 142.88°

Physical Characteristics

  • Diameter: 1.87600 km
  • Magnitude: 18.4
  • Albedo: 0.028

Derived Characteristics

  • Orbit Period: 252 days (0.69 years)
  • Avg. Orbit Speed: 33.73 km/s
  • Aphelion Distance: 1.04 AU
  • Perihelion Distance: 0.52 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 363505 (2003 UC20) 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.