Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 27,163,313 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2019 HG4 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2019 HG4 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 HG4 orbits the sun every 1,165 days (3.19 years), coming as close as 0.75 AU and reaching as far as 3.58 AU from the sun. Based on its brightness and the way it reflects light, 2019 HG4 is probably between 0.092 to 0.206 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2019 HG4's orbit is 0.04 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.

2019 HG4 has 8 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 11, 2019 27,163,313 13.138
May 17, 2035 12,374,392 19.553
Oct. 22, 2038 23,761,719 21.852
Sept. 22, 2054 29,151,356 12.957
May 21, 2086 6,506,671 17.502
Oct. 25, 2089 29,275,622 23.043
May 12, 2137 25,081,120 22.262
Oct. 16, 2140 6,750,078 17.786

Images and Observations

2019 HG4's orbit is determined by observations dating back to April 3, 2019. It was last officially observed on May 26, 2019. The IAU Minor Planet Center records 48 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2019 HG4:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 2.16618712674 AU
  • Eccentricity: 0.654148884652
  • Inclination: 7.80081018566°
  • Longitude of Ascending Node: 45.1474881462°
  • Argument of Periapsis: 265.48910383°
  • Mean Anomaly: 335.065474329°

Physical Characteristics

  • Diameter: ~0.119 km
  • Magnitude: 22.298

Derived Characteristics

  • Orbit Period: 1,165 days (3.19 years)
  • Avg. Orbit Speed: 20.24 km/s
  • Aphelion Distance: 3.58 AU
  • Perihelion Distance: 0.75 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2019 HG4 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.