Key Facts

  • Classified as a Amor-class Asteroid
  • Comparable in size to the San Francisco Bay
  • Will pass within 25,381,389 km of Earth in 2028
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

52381 (1993 HA) is a small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 1993 HA 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.

1993 HA orbits the sun every 528 days (1.45 years), coming as close as 1.09 AU and reaching as far as 1.46 AU from the sun. Based on its brightness and the way it reflects light, 1993 HA is probably between 1.740 to 7.780 kilometers in diameter, making it larger than most asteroids, very roughly comparable in size to the San Francisco Bay.

The rotation of 1993 HA has been observed. It completes a rotation on its axis every 4.11 days.

Close Approaches

1993 HA's orbit is 0.17 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.

1993 HA has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Nov. 19, 2028 25,381,389 3.031
Nov. 9, 2041 25,269,717 3.431
Oct. 31, 2054 26,479,002 3.780
Oct. 20, 2067 29,607,925 4.133
Feb. 5, 2123 28,544,279 3.337
Jan. 25, 2136 27,425,579 2.676
Jan. 12, 2149 26,990,390 1.700
Dec. 15, 2161 26,613,264 1.108
Nov. 30, 2174 26,018,273 2.440
Nov. 22, 2187 25,602,896 2.918

Images and Observations

1993 HA's orbit is determined by observations dating back to April 17, 1993. It was last officially observed on May 31, 2019. The IAU Minor Planet Center records 369 observations used to determine its orbit.

Accessibility and Exploration

1993 HA can be reached with a journey of 378 days. This trajectory would require a delta-v of 10.304 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 4,012 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 1993 HA.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 1993 HA:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 1.27822972853 AU
  • Eccentricity: 0.144109683569
  • Inclination: 7.72500174821°
  • Longitude of Ascending Node: 183.281650666°
  • Argument of Periapsis: 263.829484306°
  • Mean Anomaly: 115.247405178°

Physical Characteristics

  • Diameter: ~4.760 km
  • Magnitude: 20.0

Derived Characteristics

  • Orbit Period: 528 days (1.45 years)
  • Avg. Orbit Speed: 26.34 km/s
  • Aphelion Distance: 1.46 AU
  • Perihelion Distance: 1.09 AU
  • Rotation Period: 4.11 days

Size Comparison

Orbit Simulation

Sky Map

The position of 52381 (1993 HA) 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.