Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 7,080,167 km of Earth in 2022
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2015 WP2 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2015 WP2 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 WP2 orbits the sun every 628 days (1.72 years), coming as close as 0.78 AU and reaching as far as 2.09 AU from the sun. Based on its brightness and the way it reflects light, 2015 WP2 is probably between 0.003 to 0.006 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2015 WP2's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

2015 WP2 has 4 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 26, 2022 7,080,167 11.355
June 12, 2053 22,746,690 17.072
Nov. 20, 2058 1,215,964 12.918
Nov. 29, 2084 23,441,913 17.351

NASA Sentry has assessed impact risk for 30 very close approach scenarios. Here are the top scenarios ordered by probability of impact:

Date Probability of Impact (%) Impact Energy (Mt)
Nov. 21, 2117 0.01325 0.001573
Nov. 19, 2089 0.00328 0.001578
Nov. 20, 2082 0.00182 0.001567
Nov. 20, 2082 0.00085 0.001567
Nov. 19, 2089 0.00033 0.001569
Nov. 21, 2101 0.00015 0.001579
Nov. 19, 2080 0.00006 0.001575
Nov. 19, 2096 0.00003 0.00158
Nov. 20, 2089 0.00002 0.001566
Nov. 20, 2089 0.00001 0.001566
Nov. 21, 2106 0.00001 0.001579
Nov. 20, 2094 0.00001 0.001581
Nov. 21, 2121 0.00001 0.001578
Nov. 21, 2121 0.00001 0.001578
Nov. 21, 2119 0.00001 0.001571
Nov. 20, 2090 0.00000 0.001565
Nov. 20, 2100 0.00000 0.001576
Nov. 21, 2115 0.00000 0.001572
Nov. 20, 2087 0.00000 0.001567
Nov. 20, 2098 0.00000 0.001571
Nov. 21, 2110 0.00000 0.00158
Nov. 20, 2104 0.00000 0.001572
Nov. 20, 2098 0.00000 0.001581
Nov. 21, 2115 0.00000 0.00158
Nov. 19, 2077 0.00000 0.001571
Nov. 19, 2081 0.00000 0.001571
Nov. 21, 2110 0.00000 0.001573
Nov. 21, 2101 0.00000 0.001567
Nov. 20, 2095 0.00000 0.001569
Nov. 20, 2095 0.00000 0.001563

Images and Observations

2015 WP2's orbit is determined by observations dating back to Nov. 21, 2015. It was last officially observed on Nov. 23, 2015. The IAU Minor Planet Center records 40 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 WP2:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.436 AU
  • Eccentricity: 0.4571
  • Inclination: 1.71°
  • Longitude of Ascending Node: 57.96°
  • Argument of Periapsis: 287.98°
  • Mean Anomaly: 224.76°

Physical Characteristics

  • Diameter: ~0.003 km
  • Magnitude: 30.1

Derived Characteristics

  • Orbit Period: 628 days (1.72 years)
  • Avg. Orbit Speed: 24.88 km/s
  • Aphelion Distance: 2.09 AU
  • Perihelion Distance: 0.78 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2015 WP2 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.