Gefion family
Encyclopedia
| Name | a | e |
|---|---|---|
| 1272 Gefion 1272 Gefion 1272 Gefion is an asteroid from the asteroid belt discovered on October 10, 1931 by Reinmuth, K. at Heidelberg.-References:... |
2.78385 | 0.15170 |
| 1433 Geramtina 1433 Geramtina 1433 Geramtina is a main-belt asteroid discovered on October 30, 1937 by Eugène Joseph Delporte at the Royal Observatory of Belgium. This asteroid is named for the sister of B. Asplind.-References:... |
2.79948 | 0.16918 |
| 1751 Herget 1751 Herget 1751 Herget is the name of an asteroid which was discovered at Goethe Link Observatory near Brooklyn, Indiana by the Indiana Asteroid Program.... |
2.79319 | 0.17242 |
| 1839 Ragazza 1839 Ragazza 1839 Ragazza is a main-belt asteroid discovered on October 20, 1971 by P. Wild at Zimmerwald.- External links :*... |
2.79898 | 0.16824 |
| 2053 Nuki 2053 Nuki 2053 Nuki is a main-belt asteroid discovered on October 24, 1976 by R. M. West at La Silla.- External links :*... |
2.80260 | 0.14050 |
| 2157 Ashbrook 2157 Ashbrook 2157 Ashbrook is a main-belt asteroid discovered on March 7, 1924 by K. Reinmuth at Heidelberg.- External links :*... |
2.78440 | 0.11071 |
| 2373 Immo 2373 Immo 2373 Immo is a main-belt asteroid discovered on August 4, 1929 by Max Wolf at Heidelberg. It is named after the German astronomer Immo Appenzeller.- External links :*... |
2.79433 | 0.17339 |
| 2386 Nikonov 2386 Nikonov 2386 Nikonov is a main-belt asteroid discovered on September 19, 1974 by L. Chernykh at Nauchnyj.- External links :*... |
2.81456 | 0.15728 |
| 2493 Elmer 2493 Elmer 2493 Elmer is a main-belt asteroid discovered on December 1, 1978 by Harvard College at Agassiz Station.- External links :*... |
2.78777 | 0.17198 |
| 2521 Heidi 2521 Heidi This small asteroid is named after Johanna Spyri's well-known book, Heidi.... |
2.79475 | 0.08893 |
| 2595 Gudiachvili 2595 Gudiachvili 2595 Gudiachvili is a main-belt asteroid discovered on May 19, 1979 by Richard Martin West at La Silla Observatory.- External links :... |
2.78595 | 0.14340 |
| 2631 Zhejiang 2631 Zhejiang 2631 Zhejiang is a main-belt asteroid discovered on October 7, 1980 by Purple Mountain Observatory at Nanking.- External links :*... |
2.79730 | 0.16070 |
| 2801 Huygens 2801 Huygens 2801 Huygens is a small main belt asteroid, which was discovered by Hendrik van Gent in 1935. It belongs to the Gefion family of asteroids. It is named after Christiaan Huygens, the Dutch astronomer, mathematician and physicist.... |
2.79969 | 0.17422 |
| 2875 Lagerkvist 2875 Lagerkvist 2875 Lagerkvist is a main-belt asteroid discovered on February 11, 1983 by E. Bowell at Flagstaff .- External links :*... |
2.79792 | 0.09969 |
| 2905 Plaskett 2905 Plaskett 2905 Plaskett is a main-belt asteroid discovered on January 24, 1982 by Ted Bowell at Flagstaff . It is named after the Canadian astronomers John Stanley Plaskett and Harry Hemley Plaskett.-References:... |
2.80233 | 0.09847 |
| 2911 Miahelena 2911 Miahelena 2911 Miahelena is a main-belt asteroid discovered on April 8, 1938 by H. Alikoski at Turku.- External links :*... |
2.79520 | 0.09303 |
| 2977 Chivilikhin 2977 Chivilikhin 2977 Chivilikhin is a main-belt asteroid discovered on September 19, 1974 by Chernykh, L. at Nauchnyj.- External links :*... |
2.78884 | 0.16849 |
| 3724 Annenskij 3724 Annenskij 3724 Annenskij is a main-belt asteroid discovered on December 23, 1979 by Zhuravleva, L. at Nauchnyj.- External links :*... |
2.76293 | 0.16535 |
| 3788 Steyaert 3788 Steyaert 3788 Steyaert is a main-belt asteroid discovered on August 29, 1986 by H. Debehogne at the European Southern Observatory. It is named after the Belgian astronomer Chris Steyaert .- External links :*... |
2.79307 | 0.10127 |
| 3860 Plovdiv 3860 Plovdiv 3860 Plovdiv is a main-belt asteroid discovered on August 8, 1986 by E. W. Elst and Ivanova Elst at Rozhen.- External links :*... |
2.80586 | 0.15548 |
| 3910 Liszt 3910 Liszt 3910 Liszt is a main-belt asteroid discovered on September 16, 1988 by E. W. Elst at Haute-Provence Observatory. It was named after Hungarian composer Ferenc Liszt.- External links :*... |
2.79442 | 0.13349 |
| 3964 Danilevskij 3964 Danilevskij 3964 Danilevskij is a main-belt asteroid discovered on September 12, 1974 by Zhuravleva, L. at Nauchnyj.- External links :*... |
2.75822 | 0.16608 |
| 4020 Dominique 4020 Dominique 4020 Dominique is a main-belt asteroid discovered on March 1, 1981 by Bus, S. J. at Siding Spring.- External links :*... |
2.77626 | 0.15885 |
| 4096 Kushiro 4096 Kushiro 4096 Kushiro is a main-belt asteroid discovered on November 15, 1987 by Seiji Ueda and Hiroshi Kaneda at Kushiro.- External links :*... |
2.80989 | 0.15066 |
| 4182 Mount Locke 4182 Mount Locke 4182 Mount Locke is a main-belt asteroid discovered on May 2, 1951 by Yerkes-McDonald at Fort Davis, Texas.- External links :*... |
2.79806 | 0.13498 |
| 4702 Berounka 4702 Berounka 4702 Berounka is a main-belt asteroid discovered on April 23, 1987 by A. Mrkos at Klet.- External links :*- Notes :... |
2.79387 | 0.09181 |
| 5159 Burbine 5159 Burbine 5159 Burbine is a main-belt asteroid discovered on September 9, 1977 by Harvard Observatory at Harvard. It is named after former Mt. Holyoke College professor and current Bates College astronomy professor Tom Burbine.- External links :*... |
2.78979 | 0.10861 |
| 5401 Minamioda 5401 Minamioda 5401 Minamioda is a main-belt asteroid discovered on March 6, 1989 by T. Nomura and K. Kawanishi at Minami-Oda.- External links :*... |
2.79463 | 0.15238 |
| 2.80083 | 0.17319 | |
| 5685 Sanenobufukui 5685 Sanenobufukui 5685 Sanenobufukui is a main-belt asteroid discovered on December 8, 1990 by T. Nomura and K. Kawanishi at Minami-Oda.- External links :*... |
2.79967 | 0.09267 |
| 5712 Funke 5712 Funke 5712 Funke is a main-belt asteroid discovered on September 25, 1979 by A. Mrkos at Klet.- External links :*... |
2.77496 | 0.16644 |
| 5823 Oryo 5823 Oryo 5823 Oryo is a main-belt asteroid discovered on December 20, 1989 by T. Seki at Geisei.- External links :*... |
2.77638 | 0.16166 |
| 5955 Khromchenko 5955 Khromchenko 5955 Khromchenko is a main-belt asteroid discovered on September 2, 1987 by L. I. Chernykh at the Crimean Astrophysical Observatory.- External links :*... |
2.80234 | 0.09628 |
| 6044 Hammer-Purgstall 6044 Hammer-Purgstall 6044 Hammer-Purgstall is a main belt asteroid with an orbital period of 1687.0813666 days .The asteroid was discovered on September 13, 1991.-References:... |
2.77489 | 0.15517 |
| 6078 Burt 6078 Burt 6078 Burt is a main-belt asteroid discovered on October 10, 1980 by Shoemaker, C. S. at Palomar.- External links :*... |
2.80392 | 0.17351 |
| 6211 Tsubame 6211 Tsubame 6211 Tsubame is a main-belt asteroid discovered on February 19, 1991 by S. Inoda and T. Urata at the Karasuyama Astronomical Observatory.- External links :*... |
2.75642 | 0.09601 |
| 6594 Tasman 6594 Tasman 6594 Tasman is a main-belt asteroid discovered on June 25, 1987 by A. Mrkos at Klet.- External links :*... |
2.78152 | 0.15916 |
| 7094 Godaisan 7094 Godaisan 7094 Godaisan is a main-belt asteroid discovered on September 4, 1992 by T. Seki at Geisei.It is named after Mount Godaisan, a small mountain in the Japanese city of Kochi- External links :*... |
2.78088 | 0.16534 |
| 7211 Xerxes 7211 Xerxes 7211 Xerxes is a main-belt asteroid discovered on March 25, 1971 by Cornelis Johannes van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels at Palomar Observatory.- External links :*... |
2.79870 | 0.16302 |
| 7272 Darbydyar 7272 Darbydyar 7272 Darbydyar is a main belt asteroid with an orbital period of 1694.0049260 days . The asteroid was discovered on February 21, 1980.-References:... |
2.78220 | 0.09822 |
| (7397) 1986 QS (7397) 1986 QS 1986 QS is a main-belt minor planet. It was discovered by Henri Debehogne at the La Silla Observatory in Chile on August 26, 1986.-References:... |
2.78255 | 0.16568 |
| 7451 Verbitskaya 7451 Verbitskaya 7451 Verbitskaya is a main-belt asteroid discovered on August 8, 1978 by N. S. Chernykh at the Crimean Astrophysical Observatory.- External links :*... |
2.81240 | 0.16818 |
| (7576) 1990 BN | 2.78349 | 0.10158 |
| 7651 Villeneuve 7651 Villeneuve 7651 Villeneuve is a main belt asteroid with an orbital period of 1695.4519877 days . The asteroid was discovered on November 15, 1990.-References:... |
2.78245 | 0.14156 |
| 7735 Scorzelli 7735 Scorzelli 7735 Scorzelli is a main-belt asteroid discovered on October 31, 1980 by S. J. Bus at Palomar.- External links :*... |
2.75694 | 0.16628 |
| (8334) 1984 CF | 2.78591 | 0.09965 |
| 8440 Wigeon 8440 Wigeon 8440 Wigeon is a main-belt asteroid discovered on October 17, 1977 by Cornelis Johannes van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels at Palomar Observatory.- External links :*... |
2.78016 | 0.14078 |
| 8451 Gaidai 8451 Gaidai 8451 Gaidai is a main-belt asteroid discovered on September 11, 1977 by N. S. Chernykh at the Crimean Astrophysical Observatory.- External links :*... |
2.77253 | 0.16753 |
| 2.76992 | 0.15337 | |
| 2.78176 | 0.15170 | |
| 8819 Chrisbondi 8819 Chrisbondi 8819 Chrisbondi is a main belt asteroid with an orbital period of 1695.8484499 days . The asteroid was discovered on September 14, 1985.-References:... |
2.78098 | 0.17028 |
| 2.79053 | 0.11959 | |
| 9511 Klingsor 9511 Klingsor - External links :*... |
2.76784 | 0.14054 |
| 10245 Inselsberg 10245 Inselsberg 10245 Inselsberg is a main-belt asteroid discovered on September 24, 1960 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.- External links :*... |
2.78004 | 0.09434 |
| 2.79360 | 0.15011 | |
| 10649 VOC 10649 VOC 10649 VOC is a main belt asteroid with an orbital period of 1723.0155778 days . The asteroid was discovered on September 24, 1960.-References:... |
2.81578 | 0.12154 |
| 10665 Ortigão 10665 Ortigão 10665 Ortigão is a main belt asteroid with an orbital period of 1708.9510202 days . The asteroid was discovered on October 16, 1977.-References:... |
2.79851 | 0.15765 |
| 12275 Marcelgoffin 12275 Marcelgoffin - External links :*... |
2.76315 | 0.15291 |
| 12279 Laon 12279 Laon 12279 Laon is a main-belt asteroid discovered on November 16, 1990 by E. W. Elst at the European Southern Observatory.- External links :*... |
2.76990 | 0.09282 |
| 2.81210 | 0.10526 | |
| 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 |
| 2.78785 | 0.17691 | |
| 2.78987 | 0.17546 | |
| 19994 Tresini 19994 Tresini 19994 Tresini is a main-belt asteroid discovered on October 13, 1990 by L. G. Karachkina and G. R. Kastel' at the Crimean Astrophysical Observatory.- External links :*... |
2.77468 | 0.17725 |
| 2.75828 | 0.11401 | |
| 2.76196 | 0.10315 | |
| (26026) 4664 P-L | 2.81391 | 0.17207 |
| (26032) 6556 P-L | 2.80445 | 0.18117 |
| (26099) 1989 WH (26099) 1989 WH 1989 WH is a main-belt minor planet. It was discovered by Yoshiaki Oshima at the Gekko Observatory in the Shizuoka Prefecture of Japan, on November 20, 1989.-References:... |
2.76196 | 0.14457 |
| (26799) 1979 XL (26799) 1979 XL 1979 XL is a main-belt minor planet. It was discovered by Henri Debehogne and Edgar Rangel Netto at the La Silla Observatory in Chile on December 15, 1979.-References:... |
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 |
| 2.75702 | 0.12711 | |
| (34961) 2252 T-2 | 2.76469 | 0.16515 |
| 2.74368 | 0.08177 | |
| (37508) 3190 T-2 | 2.77635 | 0.10965 |
| 2.76154 | 0.11756 | |
| (48348) 4124 P-L | 2.79337 | 0.16135 |
| 2.78491 | 0.17877 | |
| (117991) 1033 T-2 | 2.8035 | 0.1627 |
The Gefion family of asteroids
Asteroid family
An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions...
is a grouping of S-type
S-type asteroid
S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.-Characteristics:...
asteroid
Asteroid
Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...
s in the intermediate main belt.
Properties
The members have proper orbital elementsProper orbital elements
The proper orbital elements of an orbit are constants of motion of an object in space that remain practically unchanged over an astronomically long timescale...
in the approximate ranges
Semi-major axis
The major axis of an ellipse is its longest diameter, a line that runs through the centre and both foci, its ends being at the widest points of the shape...
!! ep !! ip
Inclination
Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
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Astronomical unit
An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
At the present epoch
Epoch (astronomy)
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as celestial coordinates, or elliptical orbital elements of a celestial body, where these are subject to perturbations and vary with time...
, the range of osculating
Osculating orbit
In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space is the gravitational Kepler orbit In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space (at a given moment of time) is the gravitational Kepler orbit In astronomy,...
orbital elements
Orbital elements
Orbital elements are the parameters required to uniquely identify a specific orbit. In celestial mechanics these elements are generally considered in classical two-body systems, where a Kepler orbit is used...
of these core members is
| a Semi-major axis The major axis of an ellipse is its longest diameter, a line that runs through the centre and both foci, its ends being at the widest points of the shape... | e | i Inclination Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit... |
|
|---|---|---|---|
| min | 2.74 AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance.... |
0.081 | 7.4° |
| max | 2.82 AU | 0.18 | 10.5° |
The namesake is 1272 Gefion
1272 Gefion
1272 Gefion is an asteroid from the asteroid belt discovered on October 10, 1931 by Reinmuth, K. at Heidelberg.-References:...
. 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
2631 Zhejiang
2631 Zhejiang is a main-belt asteroid discovered on October 7, 1980 by Purple Mountain Observatory at Nanking.- External links :*...
has a diameter of 34 km, and is the largest core member whose diameter has been reliably estimated, although 2911 Miahelena
2911 Miahelena
2911 Miahelena is a main-belt asteroid discovered on April 8, 1938 by H. Alikoski at Turku.- External links :*...
is brighter, and would have a rough diameter of about 47 km, given the same (very low) albedo of 0.025.
Ceres family, Minerva family, and interlopers
Until recently, this family was known as the Ceres family or the Minerva family after 1 Ceres1 Ceres
Ceres, formally 1 Ceres, is the smallest identified dwarf planet in the Solar System and the only one in the asteroid belt. With a diameter of about 950 km, Ceres is by far the largest and most-massive asteroid, comprising about a third of the mass of the asteroid belt. Discovered on 1 January 1801...
(the largest asteroid) or 93 Minerva
93 Minerva
93 Minerva is a large trinary main-belt asteroid. It is a C-type asteroid, meaning that it has a dark surface and possibly a primitive carbonaceous composition. It was discovered by J. C. Watson on August 24, 1867, and named after Minerva, the Roman equivalent of Athena, goddess of wisdom...
. However, spectroscopic analyses showed that these largest members were in fact interlopers in their own family, having a different spectral class
Asteroid spectral types
Asteroids are assigned a type based on spectral shape, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition...
from the bulk of the members. Other known interlopers are 255 Oppavia
255 Oppavia
255 Oppavia is a sizeable Main belt asteroid. It classified as a dark P-type asteroid.It was discovered by Johann Palisa on March 31, 1886 in Vienna and was named after Opava, town in the Czech Republic , where Palisa was born....
, 374 Burgundia
374 Burgundia
374 Burgundia is a typical Main belt asteroid. It is classified as an S-type asteroid.It was discovered by Auguste Charlois on September 18, 1893 in Nice. It was named for the former French region of Burgandy...
, 2507 Bobone
2507 Bobone
2507 Bobone is a main-belt asteroid discovered on November 18, 1976 by Felix Aguilar Observatory at El Leoncito.- External links :*...
, and 2559 Svoboda
2559 Svoboda
2559 Svoboda is a main-belt asteroid discovered on October 23, 1981 by A. Mrkos at Klet.- External links :*...
. This left the fairly minor asteroid 1272 Gefion
1272 Gefion
1272 Gefion is an asteroid from the asteroid belt discovered on October 10, 1931 by Reinmuth, K. at Heidelberg.-References:...
as the lowest-numbered member.