Poseidon is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Poseidon 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.
Poseidon orbits the sun every 908 days (2.49 years), coming as close as 0.59 AU and reaching as far as 3.08 AU from the sun. Poseidon is about 3.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.
The rotation of Poseidon has been observed. It completes a rotation on its axis every 6.26 hours.
Poseidon's orbit is 0.19 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.
Poseidon has 2 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|Nov. 5, 2118||29,300,951||18.730|
|April 30, 2166||29,200,083||20.993|
Poseidon's orbit is determined by observations dating back to May 29, 1987. It was last officially observed on Sept. 7, 2021. The IAU Minor Planet Center records 619 observations used to determine its orbit.
The position of Poseidon 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.
The above comparison is an artistic rendering that uses available data on the diameter of Poseidon 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.