Support
A problem, a question or an idea? Write to giorgio.difalco@gmail.com.
How do I use the 3D view?
Drag with one finger to rotate, pinch to zoom, drag with two fingers to pan. Tap a dot to see the asteroid's card; '↺ Home view' resets everything.
Will an asteroid on the list hit Earth?
Asteroids 'being watched' have an impact probability that is almost always tiny and usually drops to zero once new observations refine the orbit. No known asteroid currently poses a significant risk over the next 100 years.
How accurate are the positions?
The lists and close approaches use JPL's precise calculations. The 3D solar system view uses simplified orbits: for years far from today, positions are approximate.
Why does my birthday show asteroids discovered later?
Because JPL also computes past flybys for recently discovered asteroids: they passed close to Earth back then, but nobody knew.
Do I need an internet connection?
To update the data and for 'Your day', yes. Everything else works offline with the latest data downloaded.
Is the computed mission realistic?
It's a simplified model (only the Sun's gravity), but it's the same method used for real missions: with DART's dates it gives the same impact speed, 6.1 km/s.