Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a football field
  • Will pass within 3,201,743 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2019 HM is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2019 HM 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.

2019 HM orbits the sun every 363 days (0.99 years), coming as close as 0.99 AU and reaching as far as 1.00 AU from the sun. Based on its brightness and the way it reflects light, 2019 HM is probably between 0.120 to 0.520 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2019 HM's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

2019 HM has 29 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 13, 2019 3,201,743 3.007
Oct. 11, 2019 7,789,631 3.198
April 10, 2020 2,776,061 3.173
Sept. 4, 2020 18,632,370 3.895
April 4, 2021 20,021,173 5.337
Nov. 8, 2064 21,924,503 5.552
April 23, 2065 21,596,469 4.855
Oct. 21, 2065 5,256,797 3.309
April 11, 2066 6,861,357 3.124
Oct. 7, 2066 6,659,414 3.131
April 9, 2067 3,904,372 3.249
April 3, 2068 23,741,516 5.979
Nov. 10, 2107 19,224,536 5.048
April 16, 2108 18,516,764 4.427
Oct. 16, 2108 3,229,765 3.125
April 9, 2109 2,218,795 3.017
Oct. 4, 2109 10,990,280 3.419
April 6, 2110 5,753,911 3.408
March 31, 2111 19,896,952 5.368
Oct. 29, 2162 19,394,037 5.231
April 23, 2163 21,863,065 4.815
Oct. 18, 2163 5,672,814 3.380
April 8, 2164 10,619,994 3.387
Oct. 9, 2164 2,966,527 3.022
April 6, 2165 1,945,789 3.048
Oct. 10, 2165 9,795,991 3.334
March 31, 2166 4,922,234 3.304
Sept. 29, 2166 19,508,647 4.543
March 21, 2167 17,513,502 4.899

Images and Observations

2019 HM's orbit is determined by observations dating back to April 22, 2019. It was last officially observed on Sept. 27, 2019. The IAU Minor Planet Center records 35 observations used to determine its orbit.

Accessibility and Exploration

2019 HM can be reached with a journey of 370 days. This trajectory would require a delta-v of 4.41 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 493,343 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2019 HM.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2019 HM:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.996147581036 AU
  • Eccentricity: 0.00667057657232
  • Inclination: 5.76699556544°
  • Longitude of Ascending Node: 203.019889376°
  • Argument of Periapsis: 196.904138528°
  • Mean Anomaly: 175.009450184°

Physical Characteristics

  • Diameter: ~0.320 km
  • Magnitude: 25.881

Derived Characteristics

  • Orbit Period: 363 days (0.99 years)
  • Avg. Orbit Speed: 29.84 km/s
  • Aphelion Distance: 1.00 AU
  • Perihelion Distance: 0.99 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2019 HM 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.