Are you glad someone is watching for PHAs?
NASA image shows
differences between orbits of
typical near-Earth asteroid (blue)
potentially hazardous asteroid, or PHA (orange).
- PHAs are subset of near-Earth asteroids (NEAs)
- Have closest orbits to Earth’s orbit (green), within 5 million miles
- Large enough to survive passage through Earth’s atmosphere
- Could cause damage on a regional, or greater, scale
Image Credit: NASA/JPL-Caltech
Can you say “Thank you, NASA?”