A potentially hazardous object is a near-Earth object, either an asteroid or a comet, with an orbit that can make exceptionally close approaches to the Earth and large enough to cause significant regional damage in the event of impact. As of 2018 there are 1 885 known potentially hazardous object, of which 157 are estimated to be larger than one kilometer in diameter.
Here are 6 popular hazardous asteroids:
1. 1685 Toro is an eccentric stony asteroid and near-Earth object of the Apollo group, approximately 4 kilometers in diameter.
2. 1862 Apollo is a stony asteroid, approximately 1.5 kilometers in diameter, classified as a near-Earth object (NEO). 1862 Apollo is a potentially hazardous asteroid (PHA) because its minimum orbit intersection distance (MOID) is less than 0.05 AU and its diameter is greater than 150 meters.
3. 1620 Geographos is a highly elongated, stony asteroid, near-Earth object and potentially hazardous asteroid of the Apollo group, with a mean-diameter of approximately 2.5 kilometers.
4. 1864 Daedalus is a stony asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter.
5. 1566 Icarus is an extremely eccentric asteroid, approximately 1.4 kilometers in diameter. It is a near-Earth object of the Apollo group and the lowest numbered potentially hazardous asteroid.
6. 1981 Midas is a vestoid asteroid, classified as a near-Earth object and potentially hazardous asteroid, approximately 2 kilometers in diameter.