Keeping Time with the Asteroids

The Catalina Sky Survey (CSS) has discovered 5790 of 13,392 known near-Earth asteroids (as of writing), as well as tens of thousands from the main belt, and over 300 comets. Astrometric observations from the three CSS telescopes have contributed to computing the orbits of the great majority of the 700,000 known asteroids of all types. CSS remains the only NEO survey to have discovered asteroids prior to Earth impact.