Cybele Asteroids
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The Cybele asteroids (also known as the "Cybeles") are a dynamical group of
asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...
s, named after the asteroid 65 Cybele. Considered by some as the last outpost of an extended
asteroid belt The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids ...
, the group consists of just over 2000 members and a few collisional
families Family (from ) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictability, structure, and safety as ...
. The Cybeles are in a 7:4
orbital resonance In celestial mechanics, orbital resonance occurs when orbiting bodies exert regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers. Most commonly, this relation ...
with
Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...
. Their orbit is defined by an osculating
semi-major axis In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the longe ...
of 3.27 to 3.70 AU, with an
eccentricity Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-Centre (geometry), center, in geometry * Eccentricity (g ...
of less than 0.3, and an
inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Eart ...
less than 30°. The dynamical Cybele group is located adjacent to the outermost
asteroid belt The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids ...
, beyond the Hecuba gap – the 2:1 resonant zone with Jupiter, where the Griqua asteroids are located – and inside the orbital region of the
Hilda asteroid The Hilda asteroids (adj. ''Hildian'') are a List of minor-planet groups#Other groups out to the orbit of Jupiter, dynamical group of more than 6,000 asteroids located beyond the asteroid belt but within Jupiter's orbit, in a 3:2 orbital resonanc ...
s (3:2 resonance), which are themselves followed by the
Jupiter trojan The Jupiter trojans, commonly called trojan asteroids or simply trojans, are a large group of asteroids that share the planet Jupiter's orbit around the Sun. Relative to Jupiter, each Trojan (celestial body), trojan Libration point orbit, librat ...
s (1:1 resonance) further out.


Description

Three known asteroid families exist within the Cybele group: the Sylvia family ( 603), the Huberta family and the
Ulla 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. An ...
(
903 __NOTOC__ Year 903 ( CMIII) was a common year starting on Saturday of the Julian calendar. Events By place Europe * King Berengar I of Italy proceeds to issue concessions and privileges to the Lombard nobility and monasteries. He gra ...
). A potential fourth family is a small cluster with the parent body . A fifth family, named after 522 Helga, was identified in 2015. The Cybele asteroids
87 Sylvia 87 Sylvia is one of the largest asteroids (approximately tied for 7th place, to within measurement uncertainties). It is the parent body of the Sylvia family and member of Cybele group located beyond the main asteroid belt (see minor-planet ...
and
107 Camilla 107 Camilla is one of the largest asteroids from the outermost edge of the asteroid belt, approximately in diameter. It is a member of the Sylvia family and located within the Cybele group. It was discovered on 17 November 1868, by English as ...
are triple systems with more than one
satellite A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation ( GPS), broadcasting, scient ...
. Other large members include 121 Hermione, 76 Freia, 790 Pretoria, and 566 Stereoskopia. The group is thought to have formed from the breakup of a larger object in the distant past. While most members are C- and
X-type asteroid The X-group of asteroids collects together several types with similar spectra, but probably quite different compositions. Tholen classification In the Tholen classification, the X-group consists of the following types: * E-type – with high ...
s, NASA's
Wide-field Infrared Survey Explorer Wide-field Infrared Survey Explorer (WISE, List of observatory codes, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy Space observatory, space telescope in the Explorers Program launched in December 2009.. . WISE L ...
also measured albedos of some Cybele asteroids that are typical for stony
S-type asteroid S-type (stony-type or silicaceous-type) asteroids are asteroids with a spectral type that is indicative of a siliceous (i.e. stony) mineralogical composition, hence the name. They have relatively high density. Approximately 17% of asteroids are ...
s.


List

Total of 2034 Cybeles with osculating semi-major axis between 3.28 and 3.7 AU. Low numbered members of the collisional Sylvia (SYL) and smaller
Ulla Ulla is a given name. It is short for Ursula (given name), Ursula in German-speaking countries and Ulrika/Ulrikke in Scandinavian countries. As of 31 December 2011, there were 61,043 females named Ulla in Sweden, with the name being most popular ...
(ULA) families are also marked. *
65 Cybele 65 Cybele is one of the largest asteroids in the Solar System. It is located in the outer asteroid belt. It is thought to be a remnant primordial body. It gives its name to the Cybele group of asteroids that orbit outward from the Sun from the ...
*
76 Freia 76 Freia is a very large main-belt asteroid. It orbits in the outer part of the asteroid belt and is classified as a Cybele asteroid. Its composition is very primitive and it is extremely dark in color. Freia was discovered by the astronomer Hei ...
*
87 Sylvia 87 Sylvia is one of the largest asteroids (approximately tied for 7th place, to within measurement uncertainties). It is the parent body of the Sylvia family and member of Cybele group located beyond the main asteroid belt (see minor-planet ...
( SYL) *
107 Camilla 107 Camilla is one of the largest asteroids from the outermost edge of the asteroid belt, approximately in diameter. It is a member of the Sylvia family and located within the Cybele group. It was discovered on 17 November 1868, by English as ...
( SYL) * 121 Hermione * 168 Sibylla *
225 Henrietta 225 Henrietta is a very large outer main-belt asteroid. It was discovered by Austrian astronomer Johann Palisa on April 19, 1882, in Vienna and named after Henrietta, wife of astronomer Pierre J. C. Janssen. The asteroid is orbiting at a distan ...
* 229 Adelinda * 260 Huberta * 319 Leona * 401 Ottilia * 414 Liriope * 420 Bertholda * 466 Tisiphone * 483 Seppina * 522 Helga * 528 Rezia * 536 Merapi * 566 Stereoskopia * 570 Kythera * 643 Scheherezade * 692 Hippodamia * 713 Luscinia * 721 Tabora * 733 Mocia * 790 Pretoria * 909 Ulla ( ULA) * 940 Kordula * 1004 Belopolskya * 1028 Lydina * 1091 Spiraea * 1154 Astronomia * 1167 Dubiago * 1177 Gonnessia * 1266 Tone * 1280 Baillauda * 1295 Deflotte * 1328 Devota * 1373 Cincinnati * 1390 Abastumani * 1467 Mashona * 1556 Wingolfia *
1574 Meyer 1574 Meyer, provisional designation , is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 59 kilometers in diameter. It was discovered on 22 March 1949, by French astronomer Louis Boyer (astronomer), Louis Boyer a ...
* 1579 Herrick * 1796 Riga * 1841 Masaryk * 1921 Pala * 2196 Ellicott *
2208 Pushkin 8 (eight) is the natural number following 7 and preceding 9. Etymology English ''eight'', from Old English '', æhta'', Proto-Germanic ''*ahto'' is a direct continuation of Proto-Indo-European '' *oḱtṓ(w)-'', and as such cognate wi ...
* 2266 Tchaikovsky * 2311 El Leoncito * 2634 James Bradley * 2697 Albina * 2702 Batrakov * 2891 McGetchin * 2932 Kempchinsky * 2976 Lautaro ( SYL) * 3015 Candy * 3024 Hainan * 3092 Herodotus * 3095 Omarkhayyam * 3141 Buchar * 3273 Drukar * 3368 Duncombe * 3396 Muazzez * 3608 Kataev * 3622 Ilinsky * 3675 Kemstach * 3727 Maxhell * 3789 Zhongguo * 3845 Neyachenko * 4003 Schumann * 4014 Heizman * 4158 Santini * 4169 Celsius * 4177 Kohman * 4236 Lidov *
4423 Golden 44 may refer to: * 44 (number) * one of the years 44 BC, AD 44, 1944, 2044 Military * 44M Tas, a Hungarian medium/heavy tank design of World War II * 44M Tas Rohamlöveg, a Hungarian tank destroyer design of World War II, derived from the 44M ...
* 4973 Showa * 5164 Mullo * 5201 Ferraz-Mello * 5301 Novobranets * 5362 Johnyoung * 5370 Taranis * 5495 Rumyantsev * 5780 Lafontaine * 5833 Peterson * 5914 Kathywhaler ( SYL) * 6039 Parmenides * 6057 Robbia * (6103) 1993 HV * 6574 Gvishiani * 6924 Fukui * 6996 Alvensleben * *
7501 Farra 75 may refer to: * 75 (number) * one of the years 75 BC, AD 75, 1975, 2075 * 75 (album), ''75'' (album), an album by Joe Zawinul * 75 Eurydike, a main-belt asteroid Vehicles * Alfa Romeo 75, a compact executive sedan * Tatra 75, a mid-size car ...
* *
7710 Ishibashi __NOTOC__ The year 771 ( DCCLXXI) was a common year starting on Tuesday of the Julian calendar. The denomination 771 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in E ...
* 8482 Wayneolm * 8917 Tianjindaxue * * 9398 Bidelman * * 9522 Schlichting * (9552) 1985 UY ( SYL) * 9767 Midsomer Norton * 10257 Garecynthia * 10379 Lake Placid * 10653 Witsen * * 11440 Massironi ( SYL) * * * * 12003 Hideosugai * * * * 13096 Tigris * * * * * 13963 Euphrates * * * * * 14871 Pyramus * 14994 Uppenkamp * * 15372 Agrigento * * * * 17427 Poe * * * 18150 Lopez-Moreno * * ( SYL) * 19149 Boccaccio * 19226 Peiresc * * * * * ( SYL) * 19694 Dunkelman * 19917 Dazaifu * 20664 Senec ( SYL) * * * * * 22692 Carfrekahl * * * * * * * * * * * ( SYL) * 25851 Browning * ( SYL) * * * * * * * * * * * * * 27719 Fast * * * ( SYL) * * 29419 Mladkova * * * * ( SYL) * * 31238 Kromeriz * * * * * * ( SYL) * * * * * * * ( SYL) * * * * * * ( SYL) * * * * * * * * (37528) 1975 SX * ( SYL) * * ( SYL) * * * * * * * * ( SYL) * * * * ( ULA) * * * * * * * * * * * 45511 Anneblack * ( SYL) * * * ( SYL) * * * * * * * * * * * * * * * * * * ( SYL) * * * * * * * ( SYL) * * * * ( SYL) * * ( SYL) * * * * ( SYL) * * * * ( ULA) * * ( SYL) * * * * ( SYL) * ( SYL) * * * ( SYL) * * * * * * * * * * * ( SYL) * * * * * * * * * * * * * * * * * * * ( SYL) * ( SYL) * * * * * * * * * * * * * * * * * * * * * * * * * * * * ( SYL) * * * * * * * * * * * (85036) 4203 P-L ( ULA) * * * * ( SYL) * * * * 88071 Taniguchijiro * * * * * * * * ( SYL) * * * * * * * ( SYL) * * * ( SYL) * ( SYL) * * * * * ( SYL) * * * * (96177) 1984 BC * * * * * * * * 99905 Jeffgrossman * * * * * * * * * ( ULA) * * * * ( SYL) * * ( SYL) * * * * * * * * * * * ( SYL) * ( SYL) * * ( SYL) * * ( SYL) * * ( SYL) * ( SYL) * * * * * ( ULA) * * ( SYL) * ( SYL) * * * ( SYL) * * * * * * * ( ULA) * * ( SYL) * ( SYL) * * * * * ( SYL) * * * * * * * ( SYL) * * * * * * * * ( SYL) * * * * * 128633 Queyras * * 129259 Tapolca ( SYL) * * * * * * * * * * * * * ( SYL) * ( SYL) * * * * ( SYL) * * * * * ( SYL) * * 136367 Gierlinger * * * * * * * * * * ( SYL) * * * * ( SYL) * * ( SYL) * * * * * * * * * * * * 145545 Wensayling * * * * * * * * * ( SYL) * * ( SYL) * * * * * * * * * 153289 Rebeccawatson ( SYL) * * * * * * * ( SYL) * ( SYL) * * * * * * * * * * ( SYL) * (159367) 1977 OX * * * * 160259 Mareike * * ( SYL) * * * * ( SYL) * * ( SYL) * ( SYL) * * * * * ( SYL) * * * * * ( SYL) * ( SYL) * * * * * * * ( SYL) * * ( SYL) * ( SYL) * * * * * * ( SYL) * * * * ( SYL) * * * ( SYL) * * * ( SYL) * 175365 Carsac ( SYL) * * * * * * * * * ( SYL) * * * * ( SYL) * * * * * * * * * ( SYL) * * * * * ( SYL) * ( SYL) * * * * * * * * * * * * * ( SYL) * * * * * * ( SYL) * ( SYL) * * * * ( ULA) * * * * * ( SYL) * * * * ( SYL) * * * * * * * * * * * * * * * * * * * * * * * ( SYL) * ( SYL) * * * ( SYL) * * * * * * * * ( SYL) * * * ( SYL) * * * * * ( SYL) * * * * * * * ( SYL) * * ( SYL) * * * * * * ( SYL) * * * * * * * ( SYL) * * ( SYL) * * ( SYL) * * ( SYL) * * * ( SYL) * * * * ( ULA) * * ( ULA) * * * * ( ULA) * * * * * * * * * * * * * * ( SYL) * * * * * ( SYL) * * * ( SYL) * * * ( ULA) * * * ( SYL) * * * ( SYL) * * * * * ( ULA) * * * ( ULA) * ( SYL) * * ( SYL) * * * * * 243285 Fauvaud * 243320 Jackuipers * * * * * * * * * * ( SYL) * ( SYL) * ( SYL) * ( SYL) * * * ( SYL) * ( SYL) * ( ULA) * * ( SYL) * * * * * ( SYL) * ( ULA) * * * ( SYL) * * * * ( SYL) * * ( SYL) * * * ( SYL) * * * * ( SYL) * * ( SYL) * 249520 Luppino * ( SYL) * * * * * * * * * * ( SYL) * * * * * * * * * * * * * * * ( SYL) * * * * ( SYL) * * * * * ( SYL) * ( SYL) * * * ( SYL) * * * * ( SYL) * * * ( SYL) * * ( SYL) * * 264061 Vitebsk * * * * * * * ( SYL) * * * * * * * * * * * * * * ( SYL) * * * * ( SYL) * * * * * * * ( SYL) * ( SYL) * ( SYL) * * * * * * * * * ( SYL) * * ( SYL) * ( SYL) * * ( SYL) * * * * * ( SYL) * * * * * * * 278447 Saviano * ( SYL) * * ( SYL) * ( SYL) * * * * ( SYL) * ( SYL) * * ( SYL) * * ( SYL) * * * * ( SYL) * ( SYL) * ( SYL) * * * ( SYL) * ( SYL) * * * * * * * ( SYL) * * * ( SYL) * ( SYL) * * * * * * * * * * * * * ( SYL) * ( SYL) * * * * * * * ( ULA) * * * * ( SYL) * * ( SYL) * * ( SYL) * * ( SYL) * * * ( SYL) * * * * ( SYL) * * * ( ULA) * * * ( SYL) * * * * * * ( SYL) * * ( SYL) * * * * * * ( ULA) * ( ULA) * ( SYL) * * ( SYL) * * * ( SYL) * ( SYL) * * * * * * * * * * * ( ULA) * * ( ULA) * * * * * * ( SYL) * * ( ULA) * ( SYL) * * * ( SYL) * * * * * * * * * ( SYL) * * * * ( SYL) * * * * ( SYL) * ( SYL) * * * * * * ( ULA) * * * * * * * * * * * ( SYL) * * * * * * * * * * * * * * * * * * ( SYL) * * ( SYL) * * * ( SYL) * * * ( SYL) * * * * * ( SYL) * * * * ( SYL) * ( SYL) * * * * * * * * ( SYL) * * ( SYL) * ( SYL) * * * * ( SYL) * * ( SYL) * * * * * * ( SYL) * * * * ( SYL) * * ( SYL) * * ( SYL) * * * * * ( SYL) * ( SYL) * * ( SYL) * * ( SYL) * ( SYL) * ( SYL) * ( SYL) * * ( SYL) * * * * * ( SYL) * * * ( SYL) * * * * ( SYL) * ( SYL) * * ( SYL) * * * * * * * * * * * * * * ( SYL) * * ( SYL) * * * * ( SYL) * * ( SYL) * * * ( SYL) * * * * ( SYL) * * * * ( SYL) * * ( SYL) * * * ( SYL) * * * * * ( SYL) * * * * * * * * * ( SYL) * ( SYL) * ( SYL) * * * * * * * * ( SYL) * * * ( SYL) * * * * ( SYL) * * ( SYL) * ( SYL) * * ( SYL) * * ( SYL) * * * * ( ULA) * * * * * * * * * * * ( SYL) * * * * * * * * * * ( SYL) * * * ( SYL) * * * * * * * ( SYL) * ( SYL) * * * * * * * * * * * * * * * * * * ( SYL) * * ( SYL) * * * * * * * * * * ( SYL) * ( SYL) * * * * * * ( SYL) * * * * * * * * * * * * * * * ( SYL) * * * ( SYL) * * ( SYL) * * * * * * * * ( ULA) * ( SYL) * * * ( SYL) * * * * * * * * ( SYL) * ( SYL) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 417955 Mallama * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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See also

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References

{{DEFAULTSORT:Cybele Asteroid *