Order  Aste-  Name       Year of   Mean    Mean Orbital  Eccen-
 No.   roid              Discov-  Diameter   Radius     tricity
        No.                ery     (km)       (AU)

  1      1    Ceres       1801      946      2.766      0.075823 
  2      4    Vesta       1807      525.4    2.362      0.08874 
  3      2    Pallas      1802      512      2.773      0.23127363 
  4     10    Hygiea      1849      431      3.139      0.1146 
  5    704    Interamnia  1910      326      3.062      0.15431 
  6     52    Europa      1858      315      3.095      0.102 
  7    511    Davida      1903      289      3.168      0.18690453 
  8     87    Sylvia      1866      286      3.485      0.080
  9     15    Eunomia     1851      268      2.643      0.187 
 10      3    Juno        1804      258      2.672      0.25545 
 

Notes:

1. Reference: Wikipedia: List of notable asteroids: Largest asteroids by diameter.
2. Ceres is actually oblate because of the centrifugal force caused by its relatively fast rotation with rotation period 9.074170(2) hours. From accurate/precise measurements, Ceres has mean equatorial diameter 963.2 km and polar diameter 891.2 km.
3. Vesta is approximately triaxial with dimensions: 572.6 x 557.2 x 446.4 km. Thus, even bodies larger than 300 km in size scale do NOT have to be exactly spherical or oblate spherical. The centrifugal force and rigid body forces can partially withstand gravity for Vesta-size astronomical objects.
4. (52) Europa is NOT to be confused with Jupiter's Galilean moon Europa which is a much bigger body.
5. Largest asteroids: Ceres ⚳, Davida, Eumonia, (52) Europa (see asteroid Europa symbol ̆ε), Hygiea ⚕, Interamnia, Juno ⚵, Pallas ⚴, Sylvia, Vesta ⚶.
6. Keywords: asteroid, asteroid belt, astronomical unit (AU) = 1.49597870700*10**11 m, diameter, eccentricity, largest asteroids, mean orbital radius.
7. Local file: Table: Largest Asteroids.
   
8. File: Asteroid file: asteroid_largest_table.html.