Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 11,408,364 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


2017 QK18 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2017 QK18 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.

2017 QK18 orbits the sun every 247 days (0.68 years), coming as close as 0.46 AU and reaching as far as 1.08 AU from the sun. Based on its brightness and the way it reflects light, 2017 QK18 is probably between 0.033 to 0.075 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2017 QK18'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.

2017 QK18 has 9 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Aug. 13, 2019 11,408,364 7.418
July 23, 2021 10,575,181 9.553
July 23, 2023 27,233,847 14.084
Sept. 18, 2040 23,857,856 13.817
Sept. 18, 2042 2,617,142 9.238
Aug. 31, 2044 9,831,646 7.438
July 23, 2048 12,630,455 10.305
July 24, 2050 28,647,358 14.425
July 25, 2077 9,730,072 9.176

Images and Observations

2017 QK18's orbit is determined by observations dating back to Aug. 24, 2017. It was last officially observed on Sept. 19, 2017. The IAU Minor Planet Center records 25 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 2017 QK18:



   or view a random object

Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 0.7695 AU
  • Eccentricity: 0.4
  • Inclination: 4.14°
  • Longitude of Ascending Node: 359.25°
  • Argument of Periapsis: 147.54°
  • Mean Anomaly: 90.49°

Physical Characteristics

  • Diameter: ~0.043 km
  • Magnitude: 24.5

Derived Characteristics

  • Orbit Period: 247 days (0.68 years)
  • Avg. Orbit Speed: 33.89 km/s
  • Aphelion Distance: 1.08 AU
  • Perihelion Distance: 0.46 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2017 QK18 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 2017 QK18 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.