144411 (2004 EW9)

Mid-sized Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 144411 (2004 EW9)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to Mount Everest
  • Will pass within 13,525,772 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

144411 (2004 EW9) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2004 EW9 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 EW9 orbits the sun every 970 days (2.66 years), coming as close as 0.89 AU and reaching as far as 2.94 AU from the sun. Based on its brightness and the way it reflects light, 2004 EW9 is probably between 1.302 to 2.911 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

The rotation of 2004 EW9 has been observed. It completes a rotation on its axis every 49.94 hours.

Close Approaches

2004 EW9's orbit is 0.09 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 EW9 has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 9, 2020 13,525,772 11.711
May 18, 2028 29,491,268 16.644
Sept. 15, 2073 26,541,897 15.208
Aug. 18, 2081 17,921,207 11.076
July 9, 2089 17,562,404 10.923
June 4, 2097 13,978,851 12.582
Sept. 11, 2150 21,276,131 13.482
Aug. 9, 2158 18,563,611 10.888
July 1, 2166 15,719,053 10.904
June 1, 2174 15,828,402 13.452

Images and Observations

2004 EW9's orbit is determined by observations dating back to March 14, 2001. It was last officially observed on March 1, 2022. The IAU Minor Planet Center records 2,475 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 EW9:

References

Search

   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.918 AU
  • Eccentricity: 0.5334
  • Inclination: 8.79°
  • Longitude of Ascending Node: 288.8°
  • Argument of Periapsis: 8.22°
  • Mean Anomaly: 71.27°

Physical Characteristics

  • Diameter: ~1.681 km
  • Magnitude: 16.55

Derived Characteristics

  • Orbit Period: 970 days (2.66 years)
  • Avg. Orbit Speed: 21.51 km/s
  • Aphelion Distance: 2.94 AU
  • Perihelion Distance: 0.89 AU
  • Rotation Period: 49.94 hours

Map Comparison

Click to load map

Orbit Simulation

⧉

Sky Map

The position of 144411 (2004 EW9) 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 2004 EW9 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.