Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 13,496,084 km of Earth in 2023
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2015 WZ12 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2015 WZ12 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.

2015 WZ12 orbits the sun every 224 days (0.61 years), coming as close as 0.42 AU and reaching as far as 1.02 AU from the sun. Based on its brightness and the way it reflects light, 2015 WZ12 is probably between 0.015 to 0.033 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2015 WZ12's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.

2015 WZ12 has 29 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Dec. 14, 2023 13,496,084 11.453
Oct. 30, 2026 10,266,928 10.339
Nov. 25, 2034 4,560,846 7.722
Dec. 13, 2042 15,230,757 11.838
Oct. 30, 2045 8,218,319 9.764
Nov. 25, 2053 4,517,149 7.730
Dec. 11, 2061 6,366,525 9.790
Oct. 28, 2064 19,966,910 12.805
Dec. 13, 2069 19,589,565 12.899
Oct. 29, 2072 9,396,335 10.171
Nov. 11, 2080 4,655,707 7.892
Dec. 10, 2088 5,024,563 9.448
Oct. 29, 2091 15,971,825 11.836
Nov. 22, 2099 4,853,663 7.710
Dec. 15, 2107 13,655,693 11.462
Oct. 31, 2110 9,198,605 10.122
Dec. 14, 2126 8,527,094 10.262
Oct. 30, 2129 15,098,027 11.631
Nov. 13, 2137 4,603,700 7.909
Dec. 11, 2145 3,715,995 9.149
Oct. 30, 2148 17,493,851 12.228
Nov. 23, 2156 4,745,125 7.718
Dec. 14, 2164 20,236,702 13.001
Nov. 6, 2167 4,138,982 8.497
Dec. 14, 2175 7,425,728 9.966
Oct. 31, 2178 11,627,305 10.753
Oct. 31, 2189 29,476,575 15.118
Dec. 14, 2194 22,556,657 13.525
Nov. 7, 2197 3,871,015 8.353

Images and Observations

2015 WZ12's orbit is determined by observations dating back to Nov. 30, 2015. It was last officially observed on Dec. 6, 2015. The IAU Minor Planet Center records 71 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 2015 WZ12:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 0.7218 AU
  • Eccentricity: 0.4125
  • Inclination: 3.64°
  • Longitude of Ascending Node: 251.06°
  • Argument of Periapsis: 346.38°
  • Mean Anomaly: 91.31°

Physical Characteristics

  • Diameter: ~0.019 km
  • Magnitude: 26.3

Derived Characteristics

  • Orbit Period: 224 days (0.61 years)
  • Avg. Orbit Speed: 35.06 km/s
  • Aphelion Distance: 1.02 AU
  • Perihelion Distance: 0.42 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2015 WZ12 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.