Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 23,299,566 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2018 LM4 is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2018 LM4 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 LM4 orbits the sun every 375 days (1.03 years), coming as close as 0.81 AU and reaching as far as 1.22 AU from the sun. Based on its brightness and the way it reflects light, 2018 LM4 is probably between 0.468 to 1.047 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 2018 LM4 has been observed. It completes a rotation on its axis every 40.60 hours.

Close Approaches

2018 LM4's orbit is 0.08 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.

2018 LM4 has 23 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Aug. 4, 2020 23,299,566 18.136
Aug. 6, 2021 12,243,146 16.393
Aug. 6, 2022 28,758,331 15.750
Jan. 31, 2025 16,203,299 18.246
Feb. 11, 2026 24,695,893 19.842
Aug. 4, 2057 22,619,781 18.060
Aug. 6, 2058 12,341,156 16.361
Aug. 6, 2059 28,820,495 15.754
Jan. 31, 2062 16,399,972 18.224
Feb. 11, 2063 24,135,314 19.781
Aug. 5, 2094 18,922,957 17.651
Aug. 7, 2095 14,591,903 16.143
Jan. 22, 2098 29,342,233 17.918
Feb. 3, 2099 15,173,847 18.503
Feb. 14, 2100 29,656,855 20.404
Aug. 7, 2131 15,157,969 17.207
Aug. 7, 2132 17,747,418 15.979
Jan. 26, 2135 25,808,572 17.920
Feb. 6, 2136 15,710,910 18.713
Aug. 6, 2168 13,601,663 16.991
Aug. 7, 2169 20,354,391 15.879
Jan. 28, 2172 22,413,680 17.968
Feb. 7, 2173 17,575,113 19.012

Images and Observations

2018 LM4's orbit is determined by observations dating back to June 11, 2018. It was last officially observed on Aug. 11, 2022. The IAU Minor Planet Center records 839 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 2018 LM4:

References

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Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 1.019 AU
  • Eccentricity: 0.2012
  • Inclination: 32.24°
  • Longitude of Ascending Node: 131.25°
  • Argument of Periapsis: 303.19°
  • Mean Anomaly: 252.36°

Physical Characteristics

  • Diameter: ~0.605 km
  • Magnitude: 18.77

Derived Characteristics

  • Orbit Period: 375 days (1.03 years)
  • Avg. Orbit Speed: 29.56 km/s
  • Aphelion Distance: 1.22 AU
  • Perihelion Distance: 0.81 AU
  • Rotation Period: 40.60 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 2018 LM4 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.

Size Rendering

The above comparison is an artistic rendering that uses available data on the diameter of 2018 LM4 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.