Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 21,949,531 km of Earth in 2021
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

138404 (2000 HA24) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2000 HA24 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2000 HA24 orbits the sun every 444 days (1.22 years), coming as close as 0.78 AU and reaching as far as 1.50 AU from the sun. Based on its brightness and the way it reflects light, 2000 HA24 is probably between 0.234 to 1.045 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 2000 HA24 has been observed. It completes a rotation on its axis every 3.91 hours.

Close Approaches

2000 HA24's orbit is 0.03 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.

2000 HA24 has 23 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 20, 2021 21,949,531 13.144
March 18, 2034 6,118,749 9.814
Sept. 27, 2038 5,243,363 9.374
March 28, 2051 27,793,899 14.377
Oct. 11, 2055 15,936,560 5.991
Feb. 10, 2062 22,904,001 6.531
Dec. 1, 2072 29,775,030 8.116
March 17, 2079 4,203,679 9.072
Sept. 26, 2083 7,998,234 10.193
March 26, 2096 24,848,586 13.798
Oct. 9, 2100 14,269,873 6.254
Feb. 11, 2107 23,249,359 6.623
Dec. 5, 2117 29,890,217 8.182
March 20, 2124 7,217,176 10.082
Oct. 1, 2128 4,908,283 8.639
Feb. 2, 2135 25,568,909 7.166
March 25, 2152 18,324,501 12.439
Oct. 13, 2156 16,222,296 5.937
March 11, 2163 12,374,471 6.644
Sept. 25, 2167 16,024,614 11.918
Nov. 19, 2184 27,083,256 7.354
March 19, 2191 4,246,426 8.943
Sept. 30, 2195 5,201,759 9.321

Images and Observations

2000 HA24's orbit is determined by observations dating back to July 20, 1982. It was last officially observed on Feb. 5, 2022. The IAU Minor Planet Center records 439 observations used to determine its orbit.

Accessibility and Exploration

2000 HA24 can be reached with a journey of 378 days. This trajectory would require a delta-v of 9.521 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 13,174 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2000 HA24.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2000 HA24:

References

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Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 1.139 AU
  • Eccentricity: 0.3185
  • Inclination: 2.16°
  • Longitude of Ascending Node: 309.37°
  • Argument of Periapsis: 142.19°
  • Mean Anomaly: 210.9°

Physical Characteristics

  • Diameter: ~0.640 km
  • Magnitude: 19.36

Derived Characteristics

  • Orbit Period: 444 days (1.22 years)
  • Avg. Orbit Speed: 27.91 km/s
  • Aphelion Distance: 1.50 AU
  • Perihelion Distance: 0.78 AU
  • Rotation Period: 3.91 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 138404 (2000 HA24) 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 2000 HA24 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.