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
Properties
[edit]![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Gefion_family.png/350px-Gefion_family.png)
The members have proper orbital elements in the approximate ranges[2]
ap | ep | ip | |
---|---|---|---|
min | 2.74 |
0.120 | 8.6° |
max | 2.82 |
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 |
0.081 | 7.4° |
max | 2.82 |
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[3] 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
[edit]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,[4] having a different spectral class from the bulk of the members. Other known interlopers are 255 Oppavia, 374 Burgundia, 2507 Bobone, and 2559 Svoboda.[5] This left the fairly minor asteroid 1272 Gefion as the lowest-numbered member.
List of members
[edit]This is a list of the known family members, without the above-mentioned interlopers.[6]
Name | a ( |
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 ( |
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 ( |
e |
---|---|---|
10665 Ortigão | 2.79851 | 0.15765 |
12275 Marcelgoffin | 2.76315 | 0.15291 |
12279 Laon | 2.76990 | 0.09282 |
(15216) 1981 EX14 | 2.81210 | 0.10526 |
(16188) 2000 AH175 | 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 MD5 | 2.75828 | 0.11401 |
(24623) 1979 MD8 | 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 EK2 | 2.75702 | 0.12711 |
(34961) 2252 T-2 | 2.76469 | 0.16515 |
(35013) 1981 EL3 | 2.74368 | 0.08177 |
(37508) 3190 T-2 | 2.77635 | 0.10965 |
(43734) 1979 MY7 | 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 |
References
[edit]- ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. S2CID 119280014.
- ^ according to the HCM analysis by V. Zappalà, Ph. Bendjoya, A. Cellino, P. Farinella and C. Froeschlé, Asteroid Families: Search of a 12,487-Asteroid Sample Using Two Different Clustering Techniques, Icarus, Volume 116, Issue 2 (August 1995), pages 291–314
- ^ AstDys Archived February 20, 2006, at the Wayback Machine
- ^ A. Cellino et al. Spectroscopic Properties of Asteroid Families, in Asteroids III, p. 633-643, University of Arizona Press (2002). (Table on page 636, in particular).
- ^ Identified by inspection of the SMASSII data set Archived January 5, 2006, at the Wayback Machine, S.J. Bus and R.P. Binzel, Phase II of the Small Main-Belt Asteroid Spectroscopic Survey, Icarus Vol. 158, p. 106 (2002).
- ^ The asteroid families data set is taken from "Archived copy". Archived from the original on February 1, 2004. Retrieved December 26, 2005.
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: CS1 maint: archived copy as title (link) with updated names and numbers as of April 2005