List of exceptional asteroids
Largest by diameter
Table:
Name

Diameter (km)
(geometric mean)
Dimensions (km)
Mean distance
from Sun (in AU)
Date discovered
Discoverer
Class

1 Ceres
946±2
965×962×891
2.766
January 1, 1801
Piazzi, G.
G

4 Vesta
525.4±0.2
572.6 × 557.2 × 446.4 ± 0.2
2.362
March 29, 1807
Olbers, H. W.
V

2 Pallas
512±3
550±4 × 516±3 × 476±3 km[2]
2.773
March 28, 1802
Olbers, H. W.
B

10 Hygiea
431±7
530×407×370
3.139
April 12, 1849
de Gasparis, A.
C

704 Interamnia
326
350×304
3.062
October 2, 1910
Cerulli, V.
F

52 Europa
315
380×330×250
3.095
February 4, 1858
Goldschmidt, H.
C

511 Davida
289
357×294×231
3.168
May 30, 1903
Dugan, R. S.
C

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.
C

15 Eunomia
268
357×255×212
2.643
July 29, 1851
de Gasparis, A.
S

3 Juno
258
320×267×200
2.672
September 1, 1804
Harding, K. L.
S

31 Euphrosyne
256
255.9 ± 5.8 km
3.149
September 1, 1854
Ferguson, J.
C

624 Hektor
241
370×195(×195)
5.235
February 10, 1907
Kopff, A.
D

88 Thisbe
232
221×201×168
2.769
June 15, 1866
Peters, C. H. F.
B

324 Bamberga
229
229×235×229
2.684
February 25, 1892
Palisa, J.
C

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.
S

48 Doris
222
278×142
3.108
September 19, 1857
Goldschmidt, H.
C

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.
C

45 Eugenia
213
305×220×145
2.720
June 27, 1857
Goldschmidt, H.
F

7 Iris
213
240×200×200
2.386
August 13, 1847
Hind, J. R.
S

29 Amphitrite
212
233×212×193
2.554
March 1, 1854
Marth, A.
S

423 Diotima
209
171×138
3.065
December 7, 1896
Charlois, A.
C

19 Fortuna
208
225×205×195
2.442
August 22, 1852
Hind, J. R.
G

13 Egeria
206
217×196
2.576
November 2, 1850
de Gasparis, A.
G

24 Themis
198
spheroid 198
3.136
April 5, 1853
de Gasparis, A.
C

94 Aurora
197
225×173
3.160
September 6, 1867
Watson, J. C.
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.
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.
B

128 Nemesis
188
188
2.751
November 25, 1872
Watson, J. C.
C

6 Hebe
186
205x185x170
2.426
July 1, 1847
Hencke, K. L.
S

16 Psyche
186
240×185×145
2.924
March 17, 1852
de Gasparis, A.
M

120 Lachesis
174
184x144
3.301
April 10, 1872
Borrelly, A.
C

41 Daphne
174
213x160
2.765
May 22, 1856
Goldschmidt, H.
C

9 Metis
174
222x182x130
2.385
April 25, 1848
Graham, A.
S

Using the table information on 'List of exceptional asteroids' (see 'Largest by diameter'), write a one-sentence description of the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.