Asteroids
There are more than one million of these bodies in an orbit lying between those of Mars and Jupiter. They range in size from a diameter of about 900 kilometers to the size of a boulder. A few can be located outside this band. They range in composition from nickel/iron to carbon.
This is a list of the twenty largest asteroids discovered.
| Name | Year Discovered |
Diameter (Km) |
Diameter (Mi) |
| Ceres | 1801 | 914 | 568 |
| Pallas | 1802 | 522 | 324 |
| Vesta | 1807 | 500 | 311 |
| Hygeia | 1849 | 430 | 267 |
| Davida | 1903 | 336 | 209 |
| Interamnia | 1910 | 334 | 208 |
| Europa | 1858 | 312 | 194 |
| Eunomia | 1851 | 272 | 169 |
| Sylvia | 1866 | 272 | 169 |
| Psyche | 1852 | 264 | 164 |
| Euphrosyne | 1854 | 248 | 154 |
| Cybele | 1861 | 246 | 153 |
| Juno | 1804 | 244 | 152 |
| Bamberga | 1892 | 242 | 150 |
| Amphitrite | 1854 | 240 | 149 |
| Diotima | 1896 | 238 | 148 |
| Camilla | 1868 | 236 | 147 |
| Herculina | 1904 | 232 | 144 |
| Patientia | 1899 | 230 | 143 |
| Doris | 1857 | 226 | 140 |
