307918 (2004 EU9)

Very small Aten-class Asteroid

Near-Earth
Space Reference » Aten-class Asteroids » 307918 (2004 EU9)

Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the U.S. Capitol building (0.37 km diameter)
  • Will pass within 25,089,144 km of Earth in 2023
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

307918 (2004 EU9) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2004 EU9 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.

2004 EU9 orbits the sun every 302 days (0.83 years), coming as close as 0.44 AU and reaching as far as 1.33 AU from the sun. 2004 EU9 is about 0.4 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, comparable in size to the U.S. Capitol building.

Close Approaches

2004 EU9's orbit is 0.17 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.

2004 EU9 has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 17, 2023 25,089,144 18.465
Feb. 16, 2042 25,030,180 18.536
Feb. 16, 2061 24,996,755 18.582
Feb. 17, 2080 24,975,993 18.625
Feb. 17, 2099 24,951,771 18.695
Feb. 18, 2118 24,948,213 18.779
Feb. 17, 2137 24,950,553 18.845
Feb. 18, 2156 24,936,767 18.887
Feb. 18, 2175 24,991,869 18.981
Feb. 18, 2194 25,084,489 19.095

Images and Observations

2004 EU9's orbit is determined by observations dating back to March 6, 2004. It was last officially observed on April 25, 2023. The IAU Minor Planet Center records 532 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 2004 EU9:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 0.8804 AU
  • Eccentricity: 0.5053
  • Inclination: 28.59°
  • Longitude of Ascending Node: 161.09°
  • Argument of Periapsis: 202.43°
  • Mean Anomaly: 341.04°

Physical Characteristics

  • Diameter: 0.37400 km
  • Magnitude: 19.0
  • Albedo: 0.358

Derived Characteristics

  • Orbit Period: 302 days (0.83 years)
  • Avg. Orbit Speed: 31.71 km/s
  • Aphelion Distance: 1.33 AU
  • Perihelion Distance: 0.44 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 307918 (2004 EU9) 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 2004 EU9 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.