The first systematic infrared search for asteroids in the Solar System estimates that there are about twice as many objects than are indicated in two recent visiblelight surveys.

Between 1.1 million and 1.9 million asteroids larger than 1 kilometer are in the main asteroid belt between Mars and Jupiter, according to results from the Deep Asteroid Search conducted with the European Space Agency's Infrared Space Observatory The results were reported by Edward Tedesco and Francois-Xavier Desert in the April 2002 issue of The Astronomical Journal.