Asteroid Diameter Sigma Source (km) (km) 1 Ceres 969.6 x 932.8 9.6 2 2 Pallas 570 x 525 x 482 22 x 4 x 15 10 3 Juno 290.2 x 245.6 1.6 x 3.8 15 4 Vesta 571 x 544 x 434 2 x 2 x 4 9 5 Astraea 120 14 3 6 Hebe 190.4 7.1 16 7 Iris 211 22 3 8 Flora 138 9 3 9 Metis 235 x 165 10 7 10 Hygiea 444 35 18 11 Parthenope 153.33 3.1 1 12 Victoria 112.77 3.1 1 13 Egeria 207.64 8.3 1 14 Irene 180 7 12 15 Eunomia 370 x 240 39 x 20 18 16 Psyche 239 26 3 17 Thetis 90.04 3.7 1 18 Melpomene 138 18 3 19 Fortuna 225 13 7 20 Massalia 145 17 3 21 Lutetia 116 17 3 22 Kalliope 181.00 4.6 1 23 Thalia 107.53 2.2 1 24 Themis 175 24 12 25 Phocaea 75.13 3.6 1 26 Proserpina 94.80 1.7 1 27 Euterpe 118 21 3 28 Bellona 120.90 3.4 1 29 Amphitrite 212.22 6.8 1 30 Urania 100.15 2.4 1 31 Euphrosyne 255.90 11.5 1 32 Pomona 80.76 1.6 1 37 Fides 108.35 1.9 1 39 Laetitia 149.52 8.6 1 40 Harmonia 107.62 6.2 1 41 Daphne 187 21 3 42 Isis 100.20 3.4 1 43 Ariadne 65.88 2.5 1 44 Nysa 70.64 4.0 1 45 Eugenia 214.63 4.2 1 48 Doris 221.80 7.5 1 51 Nemausa 170 x 136 4 x 9 14 52 Europa 302.50 5.4 1 54 Alexandra 165.75 3.4 1 60 Echo 60.20 1.8 1 63 Ausonia 103.14 2.4 1 64 Angelina 56.2 0.3 12 65 Cybele 230 16 4 67 Asia 58.11 1.4 1 68 Leto 122.57 5.3 1 69 Hesperia 138.13 4.7 1 71 Niobe 83.42 1.7 1 79 Eurynome 66.47 1.6 1 80 Sappho 79 10 3 85 Io 164 10 6 87 Sylvia 260.94 13.3 1 88 Thisbe 232 12 17 89 Julia 151.46 3.1 1 92 Undina 126.42 3.4 1 94 Aurora 204.89 3.6 1 97 Klotho 83 10 3 103 Hera 91.20 5.6 1 107 Camilla 222.62 17.1 1 115 Thyra 79.83 1.4 1 121 Hermione 209.00 4.7 1 128 Nemesis 188.16 4.0 1 129 Antigone 138 12 12 135 Hertha 79.24 2.0 1 185 Eunike 157.51 2.6 1 192 Nausikaa 95 13 3 194 Prokne 169 20 3 196 Philomela 136.39 6.3 1 216 Kleopatra 217 x 94 x 81 54 x 23 x 20 8 230 Athamantis 108.99 2.0 1 270 Anahita 50.78 2.0 1 287 Nephthys 67.60 1.4 1 324 Bamberga 227.6 1.8 13 346 Hermentaria 106.52 2.2 1 349 Dembowska 139.77 4.3 1 354 Eleonora 155.17 8.5 1 372 Palma 188.62 3.2 1 387 Aquitania 100.51 2.9 1 389 Industria 79.23 2.4 1 409 Aspasia 161.61 6.8 1 423 Diotima 208.77 4.9 1 433 Eros 34.2 x 11.2 x 11.2 0.2 x 0.2 x 0.2 11 451 Patientia 224.96 4.4 1 471 Papagena 134.19 5.2 1 511 Davida 326.06 5.3 1 532 Herculina 207 25 3 654 Zelinda 127.40 3.9 1 702 Alauda 194.73 3.2 1 704 Interamnia 329.2 10 5 Sources: 1. Tedesco, E.F. Noah, P.V., Noah, M., & Price, S.D. 2002, "The Supplemental IRAS Minor Planet Survey," Astron. J., 123, 1056-1085 2. Parker, J.W., Stern, S.A., Thomas, P.C., Festou, M.C., Merline, W.J., Young, E.F., Binzel, R.P., & Lebofsky, L.A. 2002, "Analysis of the First Disk-Resolved Images of Ceres from Ultraviolet Observations with the Hubble Space Telescope," Astron. J., 123, 549-557 3. Magri, C., Ostro, S.J., Rosema, K.D., Thomas, M.D., Mitchell, D.L., Campbell, D.B., Chandler, J.F., Shapiro, I.I., Giorgini, J.D., & Yeomans, D.K. 1999, "Mainbelt Asteroids: Results of Arecibo and Goldstone Radar Observations of 37 Objects during 1980-1995," Icarus, 140, 379-407 4. Taylor, G.E. 1981, "The Size of the Minor Planet 65 Cybele," J. Brit. Astrom. Assoc., 92, 13-15 5. Buie, M.W., Wasserman, L.H., Millis, R.L., White, N.M., Nye, R., Dunham, E.W., Bosh, A.S., Stone, R., Hubbard, W.B., Hill, R., Dunham, D., Fried, R., Klinglesmith, D., IV, Sanford, J., Schwaar, P., Maley, P., Owen, W., Benner, L., Rivken, A.S., Spitale, J., Marcialis, R.L., & Lebofsky, L.A. 1997, "Occultation of GSC 23450183 by (740) Interamnia on 1996 December 17," Bull. Amer. Astron. Soc., 29, 973 6. Erikson, A., Berthier, J., Denchev, P.V., Harris, A.W., Ioannou, Z., Kryszczynska, A., Langerkvist, C.-I., Magnusson, P., Michalowski, T., Nathues, A., Piironen, J., Pravec, P., Sarounova, L., & Velichko, F. 1999, "Photometric Observations ond Modelling of the Asteroid 85 Io in Conjunction with Data from an Occultation Event During the 1995-96 Apparition," Planet. & Space Sci., 47, 327-330 7. Storrs, A., Weiss, B., Zellner, B., Burleson, W., Sichitiu, R., Wells, E., Kowal, C., & Tholen, D., 1999, "Imaging Observations of Asteroids with Hubble Space Telescope," Icarus, 137, 260-268 8. Ostro, S.J., Hudson, R.S., Nolan, M.C., Margot, J.-L., Scheeres, D.J., Campbell, D.B., Magri, C., Giogini, J.D., & Yeomans, D.K. 2000, "Radar Observations of 216 Kleopatra, Science, 288, 836-839 9. Drummond, J.D., Fugate, R.O., & Christou, J.C., 1998, "Full Adaptive Optics Images of Asteroids Ceres and Vesta; Rotational Poles and Triaxial Ellipsoid Dimensions," Icarus, 132, 80-99 10. Drummond, J. & Christou, 1994, "Images of Asteroids 1 Ceres, 2 Pallas, and 4 Vesta with Adaptive Optics at the Starfire Optical Range," in Adaptive Optics in Astronomy, M.A. Ealy, & F. Merkle, eds. (SPIE Vol. 2201), pp. 468-471 11. Veverka, J., Robinson, M., Thomas, P., Murchie, S., Bell, J.F., III, Izenberg, N., Chapman, C., Harch, A., Bell, M., Carcich, B., Cheng, A., Clark, B., Domingue, D., Dunham, D., Farquhar, R., Gaffey, M.J., Hawkins, E., Joseph, J., Kirk, R., Li, H., Lucey, P., Malin, M., Martin, P., McFadden, L., Merline, W.J., Miller, J.K., Owen, W.M., Jr., Peterson, C., Prockter, L., Warren, J., Wellnitz, D., Williams, B.G., & Yeomans, D.K. 2000, "NEAR at Eros: Imaging and Spectral Results," Science, 289, 2088-2097 12. Diameter calculated from equation D (in km) = 1329 p (-0.5) 10 (-H/5) supplied by V. Shor (2003, private communication) where the albedo, p, is taken from the polarimetry albedos in Neese, C. 2002, "EAR-A-5-DDR-ALBEDOS-V1.0", available at the Small Bodies Data Archives (http://pdssbn.astro.umd.edu/sbnhtml/) and the absolute visual magnitude, H, is taken from Tholen, D.J. 2002, "EAR-A-5-DDR-ASTERMAG-V6.0" available at the Small Bodies Data Archives (http://pdssbn.astro.umd.edu/sbnhtml/) 13. Millis, R.L., Wasserman, L.H., Franz, O.G., Bowell, E., Nye, R.A., Thompson, D.T., White, N.M., Hubbard, W.B., Eplee, R.E., Jr., Lebofsky, L.A., Marcialis, R.L., Greenberg, R.J., Hunten, D.M., Reitsema, H.J., Qian Bochen, Dunham, D.W., Maley, P.D., Klemola, A.R., & Yeomans, D.K. 1989, "Observations of the 8 December 1987 Occultation of AG +40 0783 by 324 Bamberga," Astron. J., 98, 1094-1099 14. Dunham, E.W., Baron, R.L., Conner, S., Dunham, D.W., Dunham, J.B., Schneider, G., Cohen, H.L., Helms, V.T., III, Croom, M., & Safko, J. 1984, "Results from the Occultation of 14 Pscium by (51) Nemausa," Astron. J., 89, 1755-1758 15. Millis, R.L., Wasserman, L.H., Bowell, E., Franz, O.G., White, N.M., Lockwood, G.W., Nye, R., Bertram, R., Klemola, A., Dunham, E., Baron, R.L., Elliot, J.L., Harris, A., Young, J.W., Faulkner, J., Stanton, R., Reitsema, H.J., Hubbard, W.B., Zellner, B., Lebofsky, L., Cruikshank, D.P., Macknik, L.S., Becklin, E.E., Morrison, D., Lonsdale, C.J., Kunkle, T.D., Lee, T., Gatley, I., A'Hearn, M.F., DuPuy, D.L., Nolthenius, R., Ford, H., McKenna, D., Placova, Z., Horne, K., Sandman, W.H., Taylor, G. E., & Tucker, R. 1981, "The Diameter of Juno from Its Occultation of AG+0 1022," Astron. J., 86, 306-313 16. Dunham, D.W. & Mallen, G.1979, "The Dimensions of (6) Hebe as a Result of Occultation Observations," Revista Mexicana de Astronomia y Astrofisica, 4, 205-208 17. Millis, R.L., Wasserman, L.H., Franz, O.G., White, N.M., Bowell, E., Klemola, A., Elliot, R.C., Smethells, W.G., Price, P.M., McKay, C.P., Steel, D.I., Everhart, E., & Everhart, E.M. 1983, "The Diameter of 88 Thisbe from Its Occultation of SAO 187124," Astron. J., 88, 229-235 18. Ragazzoni, R., Baruffolo, A., Marchetti, E., Ghedina, A., Farinato, J., & Niero, T. 2000, "Speckle Interferometry Measurements of the Asteroids 10-Hygiea and 15-Eunomia," Astron. Astrophys., 354, 315-320