Key Facts

  • Classified as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 6,560,024 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2018 PN22 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2018 PN22 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.

2018 PN22 orbits the sun every 364 days (1.00 years), coming as close as 0.96 AU and reaching as far as 1.04 AU from the sun. Based on its brightness and the way it reflects light, 2018 PN22 is probably between 0.055 to 0.250 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2018 PN22's orbit is 0.01 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.

2018 PN22 has 19 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Aug. 17, 2019 6,560,024 2.303
Feb. 29, 2020 9,174,187 2.455
Sept. 14, 2020 11,197,420 2.286
Feb. 5, 2021 4,890,595 2.506
Jan. 22, 2022 4,355,867 2.742
Jan. 5, 2023 11,462,214 3.782
Dec. 23, 2023 23,179,879 5.897
July 27, 2082 26,440,685 6.582
July 27, 2083 13,932,263 4.328
July 29, 2084 3,902,400 2.830
July 30, 2085 2,228,759 2.625
July 25, 2086 6,642,386 3.104
July 21, 2087 16,843,732 4.646
July 19, 2088 29,116,750 6.850
Jan. 24, 2150 23,416,403 6.081
Jan. 27, 2151 11,229,599 3.944
Jan. 30, 2152 2,352,503 2.830
Jan. 26, 2153 8,181,513 3.489
Jan. 21, 2154 18,492,523 5.165

Images and Observations

2018 PN22's orbit is determined by observations dating back to Aug. 13, 2018. It was last officially observed on Sept. 7, 2018. The IAU Minor Planet Center records 18 observations used to determine its orbit.

Accessibility and Exploration

2018 PN22 can be reached with a journey of 362 days. This trajectory would require a delta-v of 3.892 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 5,728,330 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2018 PN22.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2018 PN22:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.997175397849 AU
  • Eccentricity: 0.0392082159922
  • Inclination: 4.38495450561°
  • Longitude of Ascending Node: 317.07745114°
  • Argument of Periapsis: 219.175986199°
  • Mean Anomaly: 36.3126969352°

Physical Characteristics

  • Diameter: ~0.153 km
  • Magnitude: 27.393

Derived Characteristics

  • Orbit Period: 364 days (1.00 years)
  • Avg. Orbit Speed: 29.83 km/s
  • Aphelion Distance: 1.04 AU
  • Perihelion Distance: 0.96 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2018 PN22 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.