Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 8,211,419 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2016 CA138 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2016 CA138 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.

2016 CA138 orbits the sun every 365 days (1.00 years), coming as close as 0.95 AU and reaching as far as 1.05 AU from the sun. Based on its brightness and the way it reflects light, 2016 CA138 is probably between 0.058 to 0.130 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2016 CA138's orbit is 0.05 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.

2016 CA138 has 46 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 18, 2019 8,211,419 14.246
Aug. 13, 2019 25,969,193 15.037
Feb. 18, 2020 8,139,306 14.256
Aug. 12, 2020 26,187,629 15.057
Feb. 18, 2021 8,189,161 14.258
Aug. 12, 2021 26,737,022 15.080
Feb. 18, 2022 8,403,752 14.273
Aug. 12, 2022 27,655,319 15.129
Feb. 18, 2023 8,838,013 14.309
Aug. 12, 2023 29,002,664 15.211
Feb. 18, 2024 9,644,372 14.345
Feb. 17, 2025 10,955,885 14.418
Feb. 18, 2026 12,802,573 14.518
Feb. 18, 2027 15,200,873 14.646
Feb. 18, 2028 18,116,277 14.832
Feb. 17, 2029 21,445,613 15.053
Feb. 17, 2030 25,151,903 15.327
Feb. 17, 2031 29,173,497 15.671
Sept. 3, 2183 26,585,094 15.847
Sept. 1, 2184 22,748,715 15.553
Aug. 30, 2185 19,318,913 15.317
Aug. 29, 2186 16,300,624 15.121
Aug. 28, 2187 13,772,681 14.977
Aug. 27, 2188 11,799,401 14.872
Feb. 20, 2189 29,687,053 14.788
Aug. 26, 2189 10,354,451 14.790
Feb. 20, 2190 27,948,232 14.678
Aug. 25, 2190 9,420,412 14.738
Feb. 20, 2191 26,604,015 14.609
Aug. 25, 2191 8,859,991 14.703
Feb. 20, 2192 25,654,301 14.558
Aug. 24, 2192 8,550,767 14.678
Feb. 19, 2193 25,004,414 14.519
Aug. 24, 2193 8,404,821 14.663
Feb. 20, 2194 24,633,258 14.506
Aug. 24, 2194 8,315,281 14.653
Feb. 20, 2195 24,495,931 14.494
Aug. 24, 2195 8,258,132 14.644
Feb. 20, 2196 24,548,877 14.489
Aug. 23, 2196 8,226,876 14.644
Feb. 19, 2197 24,826,358 14.507
Aug. 24, 2197 8,200,984 14.646
Feb. 20, 2198 25,322,574 14.520
Aug. 24, 2198 8,231,218 14.652
Feb. 20, 2199 26,033,745 14.551
Aug. 25, 2199 8,346,164 14.671

Images and Observations

2016 CA138's orbit is determined by observations dating back to Feb. 9, 2016. It was last officially observed on Feb. 19, 2019. The IAU Minor Planet Center records 133 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 2016 CA138:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 1.00014088244 AU
  • Eccentricity: 0.048302016259
  • Inclination: 27.7221760216°
  • Longitude of Ascending Node: 328.961294699°
  • Argument of Periapsis: 327.601743102°
  • Mean Anomaly: 283.467070546°

Physical Characteristics

  • Diameter: ~0.075 km
  • Magnitude: 23.3

Derived Characteristics

  • Orbit Period: 365 days (1.00 years)
  • Avg. Orbit Speed: 29.78 km/s
  • Aphelion Distance: 1.05 AU
  • Perihelion Distance: 0.95 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2016 CA138 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.