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. Orbit values for epoch JD 2457400.5 (2016-01-13). Most of the values for mass and many of the diameter values are only rough estimates.

Asteroid | Diameter | ~Mass | Rotation | Orbital | Spectral | Semi-major | Orbital | Orbital | Asteroid | ||
---|---|---|---|---|---|---|---|---|---|---|---|

Number and Name | (km) | (10^{15}kg) |
Period | Period | Class | Axis | Eccentricity | Inclination | Number and Name | ||

----------------- | --------------- | ------- | --------- | -------- | -------- | --------- | ------------ | ----------- | ----------------- | ||

1 | Ceres | 965 x 961 x 891 | 939,300 | 9.074 hrs | 4.60 yrs | C | 2.768 AU | 0.0758 | 10.59 deg | 1 | Ceres |

2 | Pallas | 582 x 556 x 500 | 205,000 | 7.813 hrs | 4.61 yrs | U | 2.772 AU | 0.2310 | 34.84 deg | 2 | Pallas |

3 | Juno | 234 | 20,000 | 7.210 hrs | 4.36 yrs | S | 2.670 AU | 0.2563 | 12.99 deg | 3 | Juno |

4 | Vesta | 569 x 555 x 453 | 259,000 | 5.342 hrs | 3.63 yrs | U | 2.362 AU | 0.0889 | 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 | 0.0835 | 6.60 deg | 45 | Eugenia |

140 | Siwa | 103 | 1,500 | 18.5 hrs | 4.51 yrs | C | 2.732 AU | 0.2161 | 3.19 deg | 140 | Siwa |

216 | Kleopatra | 217 x 94 | 5.385 hrs | 4.67 yrs | M | 2.794 AU | 0.2504 | 13.11 deg | 216 | Kleopatra | |

243 | Ida | 58 x 23 | 100 | 4.633 hrs | 4.84 yrs | S | 2.861 AU | 0.0412 | 1.13 deg | 243 | Ida |

253 | Mathilde | 66 x 48 x 46 | 103.3 | 417.7 hrs | 4.31 yrs | C | 2.647 AU | 0.2655 | 6.74 deg | 253 | Mathilde |

433 | Eros | 33 x 13 x 13 | 6.69 | 5.270 hrs | 1.76 yrs | S | 1.458 AU | 0.2227 | 10.83 deg | 433 | Eros |

1566 | Icarus | 1.4 | 0.001 | 2.273 hrs | 1.12 yrs | U | 1.078 AU | 0.8269 | 22.83 deg | 1566 | Icarus |

1620 | Geographos | 2.0 | 0.004 | 5.222 hrs | 1.39 yrs | S | 1.245 AU | 0.3354 | 13.34 deg | 1620 | Geographos |

1862 | Apollo | 1.6 | 0.002 | 3.063 hrs | 1.81 yrs | S | 1.470 AU | 0.5599 | 6.35 deg | 1862 | Apollo |

2060 | Chiron | 180 | 4,000 | 5.9 hrs | 50.7 yrs | B | 13.637 AU | 0.3827 | 6.94 deg | 2060 | Chiron |

2530 | Shipka | 5.25 yrs | 3.017 AU | 0.1280 | 10.11 deg | 2530 | Shipka | ||||

2703 | Rodari | 5.5 hrs | 3.25 yrs | 2.194 AU | 0.0566 | 6.03 deg | 2703 | Rodari | |||

2867 | Steins | 6.8 x 5.7 x 4.4 | 6.049 hrs | 3.64 yrs | E | 2.363 AU | 0.1455 | 9.93 deg | 2867 | Steins | |

3352 | McAuliffe | 2 - 5 | 2.57 yrs | 1.879 AU | 0.3690 | 4.77 deg | 3352 | McAuliffe | |||

3840 | Mimistrobell | 3.38 yrs | 2.250 AU | 0.0827 | 3.92 deg | 3840 | Mimistrobell | ||||

4179 | Toutatis | 4.6 x 2.4 x 1.9 | 0.05 | 130. hrs | 3.98 yrs | S | 2.534 AU | 0.6294 | 0.45 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 | 0.1441 | 0.91 deg | 4979 | Otawara | |

5535 | AnneFrank | 4.8 | 15.12 hrs | 3.29 yrs | S | 2.213 AU | 0.0635 | 4.25 deg | 5535 | AnneFrank | |

9969 | Braille | 2.2 x 1.0 | 226.4 hrs | 3.58 yrs | B | 2.341 AU | 0.4333 | 29.00 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 | 0.2801 | 1.62 deg | 25143 | Itokawa |

101955 | Bennu | 0.25 | 0.00014 | 4.288 hrs | 1.20 yrs | 1.126 AU | 0.2037 | 6.03 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: 20 October 2016, DRW