Wilson-Harrington is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Wilson-Harrington as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
Wilson-Harrington orbits the sun every 1,550 days (4.24 years), coming as close as 0.97 AU and reaching as far as 4.28 AU from the sun. Wilson-Harrington is about 4.0 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.
The rotation of Wilson-Harrington has been observed. It completes a rotation on its axis every 3.57 days.
Wilson-Harrington's orbit is 0.04 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.
Wilson-Harrington has 4 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|Oct. 31, 2039||16,200,472||12.130|
|Aug. 18, 2082||16,129,586||11.930|
|Oct. 30, 2155||14,313,574||11.154|
|Sept. 11, 2198||8,576,859||8.806|
Wilson-Harrington's orbit is determined by observations dating back to Nov. 19, 1949. It was last officially observed on April 2, 2020. The IAU Minor Planet Center records 983 observations used to determine its orbit.
The position of Wilson-Harrington 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.