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 small in absolute terms, but larger than 90% of 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 days.
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 6 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|March 6, 2021||16,852,610||4.585|
|April 13, 2029||37,725||7.433|
|May 26, 2058||16,109,793||4.577|
|April 2, 2094||28,783,471||11.523|
|Sept. 16, 2102||7,407,757||7.149|
|April 7, 2123||16,691,765||9.128|
NASA Sentry has assessed impact risk for 12 very close approach scenarios. Here are the top scenarios ordered by probability of impact:
|Date||Distance from Earth (km)||Distance Error (km)||Probability of Impact (%)||Impact Energy (Mt)|
|April 12, 2068||109.14||±0.00||0.00067||1151.0|
|April 14, 2103||3,852.00||±0.00||0.00005||1151.0|
|April 13, 2076||699.78||±0.00||0.00005||1151.0|
|April 11, 2065||1,078.56||±0.00||0.00003||1151.0|
|April 13, 2091||5,341.44||±0.00||0.00002||1153.0|
|April 13, 2078||404.46||±0.00||0.00002||1151.0|
|April 13, 2077||2,542.32||±0.00||0.00002||1152.0|
|April 12, 2060||4,108.80||±0.00||0.00001||1152.0|
|April 13, 2105||5,912.82||±0.00||0.00001||1151.0|
|Oct. 15, 2089||1,117.08||±0.00||0.00000||1153.0|
|Oct. 16, 2105||892.38||±0.00||0.00000||1151.0|
|Oct. 15, 2068||3,242.10||±0.00||0.00000||1151.0|
Apophis's orbit is determined by observations dating back to March 15, 2004. It was last officially observed on Jan. 3, 2015. The IAU Minor Planet Center records 4,481 observations used to determine its orbit.
Apophis can be reached with a journey of 354 days. This trajectory would require a delta-v of 6.065 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 249,940 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.