# Gefion family

The Gefion family (FIN: 516; adj. Gefionian; also known as the Ceres family or the Minerva family) is an asteroid family located in the intermediate asteroid belt between 2.74 and 2.82 AU at inclinations of 7.4° to 10.5°. The family of S-type asteroids is named after 1272 Gefion and consists of more than 2,500 known members. It had previously been known as the Ceres family. It is still known as Minerva family, named after then thought parent body 93 Minerva, until it was identified to be an interloper into its own family.

## Properties

The members have proper orbital elements in the approximate ranges
| | a$_p$ | e$_p$ | i$_p$ |
| min | 2.74 AU | 0.120 | 8.6° |
| max | 2.82 AU | 0.148 | 9.6° |
At the present epoch, the range of osculating orbital elements of these core members is
| | a | e | i |
| min | 2.74 AU | 0.081 | 7.4° |
| max | 2.82 AU | 0.18 | 10.5° |
The namesake is 1272 Gefion. The family is fairly large, e.g. the Zappala 1995 analysis found about a hundred core members. A search of a recent proper element database found 766 objects (about 0.8% of the total) lying within the region defined by the first table above.
2631 Zhejiang has a diameter of 34 km, and is the largest core member whose diameter has been reliably estimated, although 2911 Miahelena is brighter, and would have a rough diameter of about 47 km, given the same (very low) albedo of 0.025.

## Alternative name and interlopers

Until recently, this family was known as the Ceres family (adj. Cererean) or the Minerva family (adj. Minervian) after 1 Ceres (the largest asteroid) or 93 Minerva. However, spectroscopic analyses showed that these largest members were in fact interlopers in their own family, having a different spectral class from the bulk of the members. Other known interlopers are 255 Oppavia, 374 Burgundia, 2507 Bobone, and 2559 Svoboda. This left the fairly minor asteroid 1272 Gefion as the lowest-numbered member.

## List of members

This is a list of the known family members, without the above-mentioned interlopers.
| Name | a (AU) | e |
| 1272 Gefion | 2.78385 | 0.15170 |
| 1433 Geramtina | 2.79948 | 0.16918 |
| 1751 Herget | 2.79319 | 0.17242 |
| 1839 Ragazza | 2.79898 | 0.16824 |
| 2053 Nuki | 2.80260 | 0.14050 |
| 2157 Ashbrook | 2.78440 | 0.11071 |
| 2373 Immo | 2.79433 | 0.17339 |
| 2386 Nikonov | 2.81456 | 0.15728 |
| 2493 Elmer | 2.78777 | 0.17198 |
| 2521 Heidi | 2.79475 | 0.08893 |
| 2595 Gudiachvili | 2.78595 | 0.14340 |
| 2631 Zhejiang | 2.79730 | 0.16070 |
| 2801 Huygens | 2.79969 | 0.17422 |
| 2875 Lagerkvist | 2.79792 | 0.09969 |
| 2905 Plaskett | 2.80233 | 0.09847 |
| 2911 Miahelena | 2.79520 | 0.09303 |
| 2977 Chivilikhin | 2.78884 | 0.16849 |
| 3724 Annenskij | 2.76293 | 0.16535 |
| 3788 Steyaert | 2.79307 | 0.10127 |
| 3860 Plovdiv | 2.80586 | 0.15548 |
| 3910 Liszt | 2.79442 | 0.13349 |
| 3964 Danilevskij | 2.75822 | 0.16608 |
| 4020 Dominique | 2.77626 | 0.15885 |
| 4096 Kushiro | 2.80989 | 0.15066 |
| 4182 Mount Locke | 2.79806 | 0.13498 |
| 4702 Berounka | 2.79387 | 0.09181 |
| 5159 Burbine | 2.78979 | 0.10861 |
| 5401 Minamioda | 2.79463 | 0.15238 |
| Name | a (AU) | e |
| (5622) 1990 TL4 | 2.80083 | 0.17319 |
| 5685 Sanenobufukui | 2.79967 | 0.09267 |
| 5712 Funke | 2.77496 | 0.16644 |
| 5823 Oryo | 2.77638 | 0.16166 |
| 5955 Khromchenko | 2.80234 | 0.09628 |
| 6044 Hammer-Purgstall | 2.77489 | 0.15517 |
| 6078 Burt | 2.80392 | 0.17351 |
| 6211 Tsubame | 2.75642 | 0.09601 |
| 6594 Tasman | 2.78152 | 0.15916 |
| 7094 Godaisan | 2.78088 | 0.16534 |
| 7211 Xerxes | 2.79870 | 0.16302 |
| 7272 Darbydyar | 2.78220 | 0.09822 |
| (7397) 1986 QS | 2.78255 | 0.16568 |
| 7451 Verbitskaya | 2.81240 | 0.16818 |
| (7576) 1990 BN | 2.78349 | 0.10158 |
| 7651 Villeneuve | 2.78245 | 0.14156 |
| 7735 Scorzelli | 2.75694 | 0.16628 |
| (8334) 1984 CF | 2.78591 | 0.09965 |
| 8440 Wigeon | 2.78016 | 0.14078 |
| 8451 Gaidai | 2.77253 | 0.16753 |
| (8511) 1991 PY10 | 2.76992 | 0.15337 |
| (8659) 1990 SE11 | 2.78176 | 0.15170 |
| 8819 Chrisbondi | 2.78098 | 0.17028 |
| (9173) 1989 TZ15 | 2.79053 | 0.11959 |
| 9511 Klingsor | 2.76784 | 0.14054 |
| 10245 Inselsberg | 2.78004 | 0.09434 |
| (10335) 1991 PG9 | 2.79360 | 0.15011 |
| 10649 VOC | 2.81578 | 0.12154 |
| Name | a (AU) | e |
| 10665 Ortigão | 2.79851 | 0.15765 |
| 12275 Marcelgoffin | 2.76315 | 0.15291 |
| 12279 Laon | 2.76990 | 0.09282 |
| (15216) 1981 EX$_{14}$ | 2.81210 | 0.10526 |
| (16188) 2000 AH$_{175}$ | 2.76810 | 0.16222 |
| (16283) 2545 P-L | 2.76575 | 0.17269 |
| (16344) 2370 T-3 | 2.81525 | 0.15026 |
| (17344) 1120 T-3 | 2.78514 | 0.15738 |
| (17480) 1991 PE10 | 2.78785 | 0.17691 |
| (18351) 1990 QN5 | 2.78987 | 0.17546 |
| 19994 Tresini | 2.77468 | 0.17725 |
| (22259) 1979 MD$_5$ | 2.75828 | 0.11401 |
| (24623) 1979 MD$_8$ | 2.76196 | 0.10315 |
| (26026) 4664 P-L | 2.81391 | 0.17207 |
| (26032) 6556 P-L | 2.80445 | 0.18117 |
| (26099) 1989 WH | 2.76196 | 0.14457 |
| (26799) 1979 XL | 2.78649 | 0.11048 |
| (29038) 4030 T-1 | 2.79852 | 0.15112 |
| (29043) 2024 T-2 | 2.76377 | 0.14769 |
| (30655) 2289 T-1 | 2.77225 | 0.10578 |
| (30731) 1981 EK$_2$ | 2.75702 | 0.12711 |
| (34961) 2252 T-2 | 2.76469 | 0.16515 |
| (35013) 1981 EL$_3$ | 2.74368 | 0.08177 |
| (37508) 3190 T-2 | 2.77635 | 0.10965 |
| (43734) 1979 MY$_7$ | 2.76154 | 0.11756 |
| (48348) 4124 P-L | 2.79337 | 0.16135 |
| (85188) 1991 PK12 | 2.78491 | 0.17877 |
| (117991) 1033 T-2 | 2.8035 | 0.1627 |