Who's passing by Earth?
The more than 40,000 asteroids we know of, in 3D, with NASA data updated every day. For iPhone, iPad and the web.
Free, no ads, no account. In 9 languages.
What's inside
The solar system in 3D
Rotate, zoom, run time forward: every dot is a real asteroid, with the ones worth watching in orange.
Close flybys
Which asteroids will pass close to Earth in the coming months, and how close. Watch the 2029 flyby of Apophis up close, with the Moon and satellites.
Numbers that make sense
Distances in lunar distances, sizes compared with famous landmarks, energy compared with historic events. Every technical term comes with an explanation.
Design a mission
Pick an asteroid and work out how to reach it: thousands of trajectories in the chart engineers use, as for NASA's DART mission.
Being watched
The asteroids for which NASA computes an impact probability, explained without alarm: how risk is measured and why it almost always drops to zero.
Stories and guided tours
Bennu, Didymos, Ryugu, Apophis: space missions and discoveries, told in a few steps.
Your day
Pick a date, say the day you were born: AsteroRadar shows you the asteroids closest to Earth that day. Often nobody knew they existed yet. Create the image and share it.
Try your birthdayReal data, every day
Orbits, close approaches and impact probabilities come from NASA's Jet Propulsion Laboratory (Small-Body Database, CAD, Sentry, Horizons) and are updated daily. AsteroRadar is an independent project, not affiliated with NASA.