Key Facts


18172 (2000 QL7) is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2000 QL7 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.

2000 QL7 orbits the sun every 1,380 days (3.78 years), coming as close as 1.19 AU and reaching as far as 3.66 AU from the sun. Based on its brightness and the way it reflects light, 2000 QL7 is probably between 2.016 to 4.509 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

No Close Approaches

2000 QL7's orbit is 0.37 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.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

2000 QL7's orbit is determined by observations dating back to July 21, 1977. It was last officially observed on May 22, 2020. The IAU Minor Planet Center records 1,864 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 2000 QL7:



   or view a random object

Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 2.425 AU
  • Eccentricity: 0.5111
  • Inclination: 17.83°
  • Longitude of Ascending Node: 338.46°
  • Argument of Periapsis: 100.78°
  • Mean Anomaly: 44.52°

Physical Characteristics

  • Diameter: ~2.603 km
  • Magnitude: 15.6

Derived Characteristics

  • Orbit Period: 1,380 days (3.78 years)
  • Avg. Orbit Speed: 19.12 km/s
  • Aphelion Distance: 3.66 AU
  • Perihelion Distance: 1.19 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 18172 (2000 QL7) 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.