Name Diameter (km) (geometric mean) Dimensions (km) Mean distance from Sun (in AU) Date discovered Discoverer Class 1 Ceres 7002946000000000000 ♠ 946 ± 2 965 × 962 × 891 2.766 January 1, 1801 Piazzi, G. 4 Vesta 7002525400000000000 ♠ 525.4 ± 0.2 572.6 × 557.2 × 446.4 ± 0.2 2.362 March 29, 1807 Olbers, H.W. V 2 Pallas 7002512000000000000 ♠ 512 ± 3 7002550000000000000 ♠ 550 ± 4 × 7002516000000000000 ♠ 516 ± 3 × 7005476000000000000 ♠ 476 ± 3 km 2.773 March 28, 1802 Olbers, H.W. 10 Hygiea 7002431000000000000 ♠ 431 ± 7 530 × 407 × 370 3.139 April 12, 1849 de Gasparis, A. 704 Interamnia 326 350 × 304 3.062 October 2, 1910 Cerulli, V. 52 Europa 315 380 × 330 × 250 3.095 February 4, 1858 Goldschmidt, H. 511 Davida 289 357 × 294 × 231 3.168 May 30, 1903 Dugan, R.S. 87 Sylvia 286 385 × 265 × 230 3.485 May 16, 1866 Pogson, N.R. X 65 Cybele 273 302 × 290 × 232 3.439 March 8, 1861 Tempel, E.W. 15 Eunomia 268 357 × 255 × 212 2.643 July 29, 1851 de Gasparis, A. 3 Juno 258 320 × 267 × 200 2.672 September 1, 1804 Harding, K.L. 31 Euphrosyne 256 255.9 ± 5.8 km 3.149 September 1, 1854 Ferguson, J. 624 Hektor 241 370 × 195 (× 195) 5.235 February 10, 1907 Kopff, A. 88 Thisbe 232 221 × 201 × 168 2.769 June 15, 1866 Peters, C.H.F. 324 Bamberga 229 229 × 235 × 229 2.684 February 25, 1892 Palisa, J. 451 Patientia 225 225 × 234 3.059 December 4, 1899 Charlois, A. 532 Herculina 222 260 × 220 × 215 2.772 April 20, 1904 Wolf, M. 48 Doris 222 278 × 142 3.108 September 19, 1857 Goldschmidt, H. 375 Ursula 216 189 × 192 × 194 3.126 September 18, 1893 Charlois, A. 107 Camilla 215 285 × 205 × 170 3.476 November 17, 1868 Pogson, N.R. 45 Eugenia 213 305 × 220 × 145 2.720 June 27, 1857 Goldschmidt, H. 7 Iris 213 240 × 200 × 200 2.386 August 13, 1847 Hind, J.R. 29 Amphitrite 212 233 × 212 × 193 2.554 March 1, 1854 Marth, A. 423 Diotima 209 171 × 138 3.065 December 7, 1896 Charlois, A. 19 Fortuna 208 225 × 205 × 195 2.442 August 22, 1852 Hind, J.R. 13 Egeria 206 217 × 196 2.576 November 2, 1850 de Gasparis, A. 24 Themis 198 spheroid 198 3.136 April 5, 1853 de Gasparis, A. 94 Aurora 197 225 × 173 3.160 September 6, 1867 Watson, J.C. 702 Alauda 195 97.365 ± 1.6 km 3.195 July 16, 1910 Helffrich, J. C / B 121 Hermione 190 268 × 186 × 183 3.457 May 12, 1872 Watson, J.C. 259 Aletheia 190 178 × 190 3.135 June 28, 1886 Peters, C.H.F. C / P / X 372 Palma 189 188 3.149 August 19, 1893 Charlois, A. 128 Nemesis 188 188 2.751 November 25, 1872 Watson, J.C. 6 Hebe 186 205x185x170 2.426 July 1, 1847 Hencke, K.L. 16 Psyche 186 240 × 185 × 145 2.924 March 17, 1852 de Gasparis, A. 120 Lachesis 174 184x144 3.301 April 10, 1872 Borrelly, A. 41 Daphne 174 213x160 2.765 May 22, 1856 Goldschmidt, H. 9 Metis 174 222x182x130 2.385 April 25, 1848 Graham, A.
what is the biggest asteroid in the solar system
Ceres