Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 17,005,970 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2005 UG5 is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2005 UG5 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.

2005 UG5 orbits the sun every 396 days (1.08 years), coming as close as 0.86 AU and reaching as far as 1.25 AU from the sun. Based on its brightness and the way it reflects light, 2005 UG5 is probably between 0.240 to 1.070 kilometers in diameter, making it small in absolute terms, but larger than ~97% of asteroids, very roughly comparable in size to the Golden Gate Bridge.

Close Approaches

2005 UG5'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.

2005 UG5 has 33 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Jan. 13, 2019 17,005,970 3.994
May 24, 2020 25,665,615 10.148
Oct. 19, 2031 25,095,413 4.061
Feb. 5, 2032 19,377,130 4.644
March 6, 2045 19,223,638 4.729
June 27, 2045 26,937,028 3.843
Nov. 18, 2056 27,339,718 10.572
March 30, 2058 16,299,790 4.147
Nov. 19, 2069 24,218,295 9.936
April 5, 2071 15,359,623 3.971
March 15, 2084 18,428,255 4.555
June 19, 2084 24,657,166 3.468
Oct. 9, 2096 27,727,485 4.421
Feb. 16, 2097 19,929,165 4.799
Nov. 1, 2109 20,911,230 3.453
Jan. 19, 2110 17,844,247 4.188
May 26, 2111 26,341,400 10.269
Nov. 11, 2122 18,221,964 2.997
Jan. 9, 2123 16,366,781 3.840
May 24, 2124 23,698,449 9.765
Oct. 29, 2135 22,102,547 3.619
Jan. 24, 2136 18,321,612 4.353
May 26, 2137 29,853,042 10.976
Oct. 8, 2148 28,432,279 4.506
Feb. 20, 2149 19,768,611 4.814
July 8, 2149 29,683,308 4.312
March 21, 2162 17,753,473 4.426
June 15, 2162 23,359,078 3.235
Nov. 20, 2173 24,976,721 10.095
April 5, 2175 15,421,997 4.007
Nov. 19, 2186 26,963,417 10.489
March 28, 2188 16,806,500 4.227
June 5, 2188 21,360,629 2.751

Images and Observations

2005 UG5's orbit is determined by observations dating back to Oct. 27, 2005. It was last officially observed on Nov. 1, 2018. The IAU Minor Planet Center records 30 observations used to determine its orbit.

Accessibility and Exploration

2005 UG5 can be reached with a journey of 386 days. This trajectory would require a delta-v of 6.766 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 378,678 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2005 UG5.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2005 UG5:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.055 AU
  • Eccentricity: 0.1832
  • Inclination: 2.73°
  • Longitude of Ascending Node: 35.78°
  • Argument of Periapsis: 111.07°
  • Mean Anomaly: 72.19°

Physical Characteristics

  • Diameter: ~0.655 km
  • Magnitude: 24.3

Derived Characteristics

  • Orbit Period: 396 days (1.08 years)
  • Avg. Orbit Speed: 28.98 km/s
  • Aphelion Distance: 1.25 AU
  • Perihelion Distance: 0.86 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2005 UG5 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.