Apophis is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified Apophis as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
Apophis orbits the sun every 324 days (0.89 years), coming as close as 0.75 AU and reaching as far as 1.10 AU from the sun. Apophis is about 0.3 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.
The rotation of Apophis has been observed. It completes a rotation on its axis every 30.40 hours.
Apophis's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.
Apophis has 10 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|March 6, 2021||16,852,647||4.585|
|April 13, 2029||38,012||7.423|
|Aug. 24, 2044||12,016,712||3.955|
|April 20, 2051||6,201,717||4.695|
|Sept. 16, 2066||10,406,426||7.763|
|July 27, 2073||16,793,463||4.566|
|May 9, 2080||13,005,068||4.198|
|April 7, 2087||14,333,334||8.659|
|Sept. 11, 2102||3,505,412||5.662|
|April 12, 2116||2,911,545||6.444|
Apophis's orbit is determined by observations dating back to March 15, 2004. It was last officially observed on May 12, 2021. The IAU Minor Planet Center records 7,300 observations used to determine its orbit.
Apophis can be reached with a journey of 354 days. This trajectory would require a delta-v of 6.049 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 272,328 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for Apophis.
The position of Apophis 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 below comparison is an artistic rendering that uses available data on the diameter of Apophis 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.