The image above is Ceres taken from the Dawn spacecraft. Below is a table of information on selected asteroids, and at the bottom of the page are comments on the asteroids. Most of the values for mass and many of the diameter values are only rough estimates.

Asteroid Diameter ~Mass Rotation Orbital Spectral Semimajor Orbital Orbital Number Number and Name (km) 10^{15}kg Period Period Class Axis Eccentricity Inclination and Name --------------- -------- ------- -------- ------- -------- --------- ------------ ----------- -------- 1 Ceres 975 x 909 947,000 9.074 hrs 4.60 yrs C 2.767 AU 0.0789 10.58 deg 1 Ceres 2 Pallas 582 x 556 x 500 214,000 7.813 hrs 4.61 yrs U 2.774 AU 0.2299 34.84 deg 2 Pallas 3 Juno 234 20,000 7.210 hrs 4.36 yrs S 2.669 AU 0.2579 12.97 deg 3 Juno 4 Vesta 569 x 555 x 453 259,000 5.342 hrs 3.63 yrs U 2.362 AU 0.0895 7.14 deg 4 Vesta 21 Lutetia 124 x 101 x 80 1,700 8.168 hrs 3.80 yrs C 2.435 AU 0.1646 3.06 deg 21 Lutetia 45 Eugenia 215 6,100 5.699 hrs 4.49 yrs FC 2.721 AU 0.0831 6.61 deg 45 Eugenia 140 Siwa 103 1,500 18.5 hrs 4.51 yrs C 2.734 AU 0.2157 3.19 deg 140 Siwa 216 Kleopatra 217 x 94 5.385 hrs 4.67 yrs M 2.793 AU 0.2535 13.14 deg 216 Kleopatra 243 Ida 58 x 23 100 4.633 hrs 4.84 yrs S 2.861 AU 0.0451 1.14 deg 243 Ida 253 Mathilde 66 x 48 x 46 103.3 417.7 hrs 4.31 yrs C 2.646 AU 0.2660 6.71 deg 253 Mathilde 433 Eros 33 x 13 x 13 6.69 5.270 hrs 1.76 yrs S 1.458 AU 0.2229 10.83 deg 433 Eros 951 Gaspra 19 x 12 x 11 10 7.042 hrs 3.29 yrs S 2.209 AU 0.1738 4.10 deg 951 Gaspra 1566 Icarus 1.4 0.001 2.273 hrs 1.12 yrs U 1.078 AU 0.8269 22.86 deg 1566 Icarus 1620 Geographos 2.0 0.004 5.222 hrs 1.39 yrs S 1.245 AU 0.3356 13.34 deg 1620 Geographos 1862 Apollo 1.6 0.002 3.063 hrs 1.81 yrs S 1.471 AU 0.5600 6.36 deg 1862 Apollo 2060 Chiron 180 4,000 5.9 hrs 50.7 yrs B 13.633 AU 0.3801 6.94 deg 2060 Chiron 2530 Shipka 5.25 yrs 3.019 AU 0.1237 10.10 deg 2530 Shipka 2703 Rodari 5.5 hrs 3.25 yrs 2.194 AU 0.0572 6.04 deg 2703 Rodari 2867 Steins 6.8 x 5.7 x 4.4 6.049 hrs 3.64 yrs E 2.364 AU 0.1452 9.93 deg 2867 Steins 3352 McAuliffe 2 - 5 2.57 yrs 1.879 AU 0.3686 4.77 deg 3352 McAuliffe 3840 Mimistrobell 3.38 yrs 2.249 AU 0.0831 3.92 deg 3840 Mimistrobell 4179 Toutatis 4.6 x 2.4 x 1.9 0.05 130. hrs 3.98 yrs S 2.512 AU 0.6339 0.47 deg 4179 Toutatis 4769 Castalia 1.8 x 0.8 0.0005 4.095 hrs 1.10 yrs 1.063 AU 0.4831 8.89 deg 4769 Castalia 4979 Otawara 5.5 0.2 2.707 hrs 3.19 yrs 2.168 AU 0.1449 0.91 deg 4979 Otawara 5535 AnneFrank 4.8 15.12 hrs 3.29 yrs S 2.212 AU 0.0643 4.25 deg 5535 AnneFrank 9969 Braille 2.2 x 1.0 226.4 hrs 3.58 yrs B 2.341 AU 0.4336 29.0 deg 9969 Braille 25143 Itokawa 0.5 x 0.3 x 0.2 0.000035 12.13 hrs 1.52 yrs S 1.324 AU 0.2789 1.71 deg 25143 Itokawa 101955 Bennu 0.25 0.00014 4.288 hrs 1.20 yrs 1.126 AU 0.2037 6.04 deg 101955 Bennu

New masses calculated for 3 largest asteroids - U.S. Naval Observatory press release, 7 January 1998

Notes on the Fact Sheets

Asteroid Home Page

Directory to other Planetary Fact Sheets

Author/Curator:

Dr. David R. Williams, dave.williams@nasa.gov

NSSDCA, Mail Code 690.1

NASA Goddard Space Flight Center

Greenbelt, MD 20771

+1-301-286-1258

Last Updated: 28 January 2016, DRW