2014 SM143

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 2014 SM143

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 5,138,670 km of Earth in 2036
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

2014 SM143 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2014 SM143 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2014 SM143 orbits the sun every 483 days (1.32 years), coming as close as 0.70 AU and reaching as far as 1.72 AU from the sun. Based on its brightness and the way it reflects light, 2014 SM143 is probably between 0.223 to 0.499 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

The rotation of 2014 SM143 has been observed. It completes a rotation on its axis every 2.91 hours.

Close Approaches

2014 SM143's orbit is 0.01 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

2014 SM143 has 18 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
April 21, 2036 5,138,670 18.115
April 14, 2040 16,748,244 15.256
Oct. 31, 2059 28,839,525 14.023
Oct. 24, 2063 6,253,982 16.620
Oct. 18, 2067 13,348,539 19.438
April 26, 2089 20,825,797 20.522
April 19, 2093 1,489,793 17.477
April 14, 2097 15,849,041 15.368
Oct. 29, 2124 23,361,365 14.556
Oct. 24, 2128 7,082,712 16.501
Oct. 20, 2132 6,773,284 18.442
Oct. 15, 2136 23,998,123 21.137
April 30, 2158 28,124,690 21.721
April 24, 2162 10,823,499 18.982
April 19, 2166 4,925,336 16.778
April 13, 2170 23,611,996 14.502
Oct. 28, 2193 18,473,948 15.080
Oct. 23, 2197 140,939 17.618

Images and Observations

2014 SM143's orbit is determined by observations dating back to Oct. 26, 2010. It was last officially observed on Sept. 2, 2022. The IAU Minor Planet Center records 135 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 2014 SM143:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.206 AU
  • Eccentricity: 0.4226
  • Inclination: 24.22°
  • Longitude of Ascending Node: 28.81°
  • Argument of Periapsis: 89.64°
  • Mean Anomaly: 215.99°

Physical Characteristics

  • Diameter: ~0.288 km
  • Magnitude: 20.38

Derived Characteristics

  • Orbit Period: 483 days (1.32 years)
  • Avg. Orbit Speed: 27.16 km/s
  • Aphelion Distance: 1.72 AU
  • Perihelion Distance: 0.70 AU
  • Rotation Period: 2.91 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 2014 SM143 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 below comparison is an artistic rendering that uses available data on the diameter of 2014 SM143 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.