Key Facts

  • Classified as a Amor-class Asteroid
  • Comparable in size to the San Francisco Bay
  • Will pass within 55,179,365 km of Earth in 2019
  • 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 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 1.74 to 7.78 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 a wide berth between this asteroid and Earth at all times.

1993 HA has 56 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 15, 2019 55,179,365 6.060
June 15, 2022 71,051,147 6.538
Aug. 18, 2025 57,495,503 5.762
Nov. 19, 2028 25,381,384 3.031
April 10, 2032 53,282,276 5.970
June 12, 2035 70,894,805 6.568
Aug. 13, 2038 59,406,249 5.840
Nov. 9, 2041 25,269,712 3.431
April 5, 2045 50,928,316 5.811
June 7, 2048 70,581,123 6.586
Aug. 8, 2051 61,529,475 5.965
Oct. 31, 2054 26,478,995 3.780
March 30, 2058 47,865,650 5.628
June 1, 2061 69,956,631 6.574
Aug. 1, 2064 63,904,261 6.065
Oct. 20, 2067 29,607,916 4.133
March 22, 2071 43,953,100 5.342
May 26, 2074 68,827,159 6.586
July 24, 2077 66,257,683 6.203
Oct. 7, 2080 34,366,506 4.520
March 11, 2084 39,306,391 4.963
May 18, 2087 67,116,339 6.524
July 17, 2090 68,244,307 6.299
Sept. 26, 2093 39,682,732 4.865
Feb. 27, 2097 34,711,491 4.471
May 11, 2100 64,964,997 6.480
July 10, 2103 69,658,775 6.394
Sept. 17, 2106 44,678,621 5.138
Feb. 17, 2110 30,915,941 3.942
May 5, 2113 62,658,010 6.377
July 3, 2116 70,475,639 6.451
Sept. 9, 2119 48,617,831 5.359
Feb. 5, 2123 28,544,281 3.337
April 29, 2126 60,459,432 6.295
June 28, 2129 70,887,156 6.478
Sept. 2, 2132 51,523,463 5.498
Jan. 25, 2136 27,425,577 2.676
April 25, 2139 58,602,938 6.215
June 25, 2142 71,037,687 6.522
Aug. 29, 2145 53,583,858 5.594
Jan. 12, 2149 26,990,387 1.700
April 21, 2152 57,129,280 6.121
June 22, 2155 71,080,793 6.525
Aug. 26, 2158 55,096,074 5.689
Dec. 15, 2161 26,613,262 1.108
April 18, 2165 55,866,967 6.067
June 19, 2168 71,073,605 6.522
Aug. 23, 2171 56,348,915 5.741
Nov. 30, 2174 26,018,272 2.440
April 16, 2178 54,667,488 6.012
June 17, 2181 71,021,215 6.549
Aug. 20, 2184 57,585,292 5.794
Nov. 22, 2187 25,602,894 2.918
April 13, 2191 53,329,402 5.919
June 15, 2194 70,927,575 6.561
Aug. 16, 2197 59,032,013 5.887

Images and Observations

1993 HA's orbit is determined by observations dating back to April 17, 1993. It was last officially observed on Feb. 5, 2019. The IAU Minor Planet Center records 291 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: 1.27822972817 AU
  • Eccentricity: 0.144109697886
  • Inclination: 7.72500006542°
  • Longitude of Ascending Node: 183.281660026°
  • Argument of Periapsis: 263.829477288°
  • Mean Anomaly: 115.247404085°

Physical Characteristics

  • Diameter: ~4.76 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.