Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation


162421 (2000 ET70) is a small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2000 ET70 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2000 ET70 orbits the sun every 336 days (0.92 years), coming as close as 0.83 AU and reaching as far as 1.06 AU from the sun. Based on its brightness and the way it reflects light, 2000 ET70 is probably between 0.668 to 1.493 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 2000 ET70 has been observed. It completes a rotation on its axis every 8.95 hours.

No Close Approaches

2000 ET70's orbit is 0.03 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 ET70's orbit is determined by observations dating back to Feb. 18, 1977. It was last officially observed on Feb. 11, 2021. The IAU Minor Planet Center records 379 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 ET70:



   or view a random object

Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 0.9467 AU
  • Eccentricity: 0.1238
  • Inclination: 22.32°
  • Longitude of Ascending Node: 331.14°
  • Argument of Periapsis: 46.1°
  • Mean Anomaly: 183.18°

Physical Characteristics

  • Diameter: ~0.862 km
  • Magnitude: 18.0

Derived Characteristics

  • Orbit Period: 336 days (0.92 years)
  • Avg. Orbit Speed: 30.65 km/s
  • Aphelion Distance: 1.06 AU
  • Perihelion Distance: 0.83 AU
  • Rotation Period: 8.95 hours

Map Comparison

Click to load map

Orbit Simulation

Sky Map

The position of 162421 (2000 ET70) 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 above comparison is an artistic rendering that uses available data on the diameter of 2000 ET70 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.