The Cybele asteroids (also known as the "Cybeles") are a
dynamical group of
asteroids, 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, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, c ...
, the group consists of just over 2000 members and a few collisional
families
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideal ...
.
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 relationsh ...
with
Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but slightly less than one-thousandth t ...
. Their orbit is defined by an osculating
semi-major axis of 3.28 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 25°.
The dynamical Cybele group is located adjacent to the outermost
asteroid belt
The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, c ...
, 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 asteroids (3:2 resonance), which are themselves followed by the
Jupiter trojans (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 (
903
__NOTOC__
Year 903 ( CMIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.
Events
By place
Europe
* King Berengar I of Italy proceeds to issue concessions and privileges to the Lo ...
). 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 and
107 Camilla are
triple systems with more than one
satellite
A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioi ...
. Other large members include
121 Hermione
Hermione (minor planet designation: 121 Hermione) is a very large binary asteroid discovered in 1872. It orbits in the Cybele group in the far outer asteroid belt. As an asteroid of the dark C spectral type, it is probably composed of carbonaceo ...
,
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 al ...
s, NASA's
Wide-field Infrared Survey Explorer
Wide-field Infrared Survey Explorer (WISE, observatory code C51, Explorer 92 and SMEX-6) is a NASA infrared astronomy space telescope in the Explorers Program. It was launched in December 2009, and placed in hibernation mode in February 201 ...
also measured
albedos of some Cybele asteroids that are typical for stony
S-type asteroid
S-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 of this type, making it the secon ...
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 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 during the 1930s a ...
(ULA) families are also marked.
*
65 Cybele
*
76 Freia
*
87 Sylvia (
SYL)
*
107 Camilla (
SYL)
*
121 Hermione
Hermione (minor planet designation: 121 Hermione) is a very large binary asteroid discovered in 1872. It orbits in the Cybele group in the far outer asteroid belt. As an asteroid of the dark C spectral type, it is probably composed of carbonaceo ...
*
168 Sibylla
*
225 Henrietta
*
229 Adelinda
*
260 Huberta
*
319 Leona
*
401 Ottilia
*
414 Liriope
*
420 Bertholda
Bertholda (minor planet designation: 420 Bertholda) is a very large main-belt asteroid. It was discovered by Max Wolf on September 7, 1896, in Heidelberg, Germany. The object is part of the Cybele asteroid group, and is classified as a P-type ast ...
*
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
1028 Lydina, provisional designation , is a carbonaceous background asteroid and member of the Cybele group from the outermost regions of the asteroid belt, approximately in diameter. It was discovered at the Simeiz Observatory on the Crimean p ...
*
1091 Spiraea
*
1154 Astronomia
*
1167 Dubiago
*
1177 Gonnessia
1177 Gonnessia, provisional designation , is a dark background asteroid from the outer regions of the asteroid belt, approximately 99 kilometers in diameter. It was discovered on 24 November 1930, by French astronomer Louis Boyer at the Algiers ...
*
1266 Tone
1266 Tone is a dark background asteroid from the outer regions of the asteroid belt, approximately 80 kilometers in diameter. Discovered by astronomer Okuro Oikawa at the Tokyo Observatory in 1927, it was assigned the provisional designation . ...
*
1280 Baillauda
*
1295 Deflotte
*
1328 Devota
*
1373 Cincinnati
1373 Cincinnati, provisional designation , is an asteroid in a comet-like orbit from the Cybele region, located at the outermost rim of the asteroid belt, approximately in diameter. It was the only asteroid discovery made by famous American a ...
*
1390 Abastumani
1390 Abastumani ( ''prov. designation'': ) is a very large and dark background asteroid from the outer region of the asteroid belt. It was discovered on 3 October 1935, by Russian astronomer Pelageya Shajn at the Simeiz Observatory on the Crime ...
*
1467 Mashona
*
1556 Wingolfia
*
1574 Meyer
*
1579 Herrick
*
1796 Riga
*
1841 Masaryk
*
1921 Pala
*
2196 Ellicott
*
2208 Pushkin
*
2266 Tchaikovsky
*
2311 El Leoncito
*
2634 James Bradley
*
2697 Albina
*
2702 Batrakov
*
2891 McGetchin
*
2932 Kempchinsky
*
2976 Lautaro (
SYL)
*
3015 Candy
*
3024 Hainan
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societie ...
*
3092 Herodotus
*
3095 Omarkhayyam
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societie ...
*
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
4177 Kohman, provisional designation , is a resonant Griqua asteroid from the outermost regions of the asteroid belt, approximately in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at the Anderson Mesa S ...
*
4236 Lidov
4 (four) is a number, numeral (linguistics), numeral and numerical digit, digit. It is the natural number following 3 and preceding 5. It is the smallest semiprime and composite number, and is tetraphobia, considered unlucky in many East Asian c ...
*
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 Tas ta ...
*
4973 Showa
*
5164 Mullo
*
5201 Ferraz-Mello
5201 Ferraz-Mello is an asteroid from the asteroid belt, discovered on 1 December 1983 by Ted Bowell at the Anderson Mesa Station of the Lowell Observatory. It is one of very few Hecuba-gap asteroids located in the 2:1 mean motion resonance wit ...
*
5301 Novobranets
*
5362 Johnyoung
*
5370 Taranis
__NOTOC__
Year 537 ( DXXXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Second year after the Consulship of Belisarius (or, less frequently, year 1290 ...
*
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, 1875 CE, 1975 CE, 2075 CE
* ''75'' (album), an album by Joe Zawinul
* M75 (disambiguation), including "Model 75"
* Highway 75, see List of highways numbered 75
*Alfa Romeo 75, a c ...
*
*
7710 Ishibashi
*
8482 Wayneolm
*
8917 Tianjindaxue
*
*
9398 Bidelman
*
*
9522 Schlichting
*
(9552) 1985 UY (
SYL)
*
9767 Midsomer Norton
*
10257 Garecynthia
*
10379 Lake Placid
*
10653 Witsen
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit (measurement), unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment ...
*
*
11440 Massironi (
SYL)
*
*
*
*
12003 Hideosugai
*
*
*
*
13096 Tigris
*
*
*
*
*
13963 Euphrates
*
*
*
*
*
14871 Pyramus
14871 Pyramus, provisional designation , is a dark Zhongguo asteroid from the outermost region of the asteroid belt, approximately in diameter. It was discovered on 13 October 1990 by German astronomers Lutz Schmadel and Freimut Börngen at the K ...
*
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)
*
*
*
*
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* (
SYL)
*
*
*
*
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* (
SYL)
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*
(37528) 1975 SX
* (
SYL)
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SYL)
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* (
SYL)
*
*
*
* (
ULA)
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45511 Anneblack
* (
SYL)
*
*
* (
SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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(85036) 4203 P-L (
ULA)
*
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*
* (
SYL)
*
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*
88071 Taniguchijiro
*
*
*
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*
* (
SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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(96177) 1984 BC
*
*
*
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99905 Jeffgrossman
*
*
*
*
*
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*
*
* (
ULA)
*
*
*
* (
SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
*
*
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ULA)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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128633 Queyras
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1 ...
*
*
129259 Tapolca (
SYL)
*
*
*
*
*
*
*
*
*
*
*
*
* (
SYL)
* (
SYL)
*
*
*
* (
SYL)
*
*
*
*
* (
SYL)
*
*
136367 Gierlinger
*
*
*
*
*
*
*
*
*
* (
SYL)
*
*
*
* (
SYL)
*
* (
SYL)
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*
*
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145545 Wensayling
*
*
*
*
*
*
*
*
* (
SYL)
*
* (
SYL)
*
*
*
*
*
*
*
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*
153289 Rebeccawatson (
SYL)
*
*
*
*
*
*
* (
SYL)
* (
SYL)
*
*
*
*
*
*
*
*
*
* (
SYL)
*
(159367) 1977 OX
*
*
*
*
160259 Mareike
*
* (
SYL)
*
*
*
* (
SYL)
*
* (
SYL)
* (
SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
* (
SYL)
*
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*
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SYL)
*
*
*
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SYL)
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* (
SYL)
*
*
* (
SYL)
*
175365 Carsac (
SYL)
*
*
*
*
*
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*
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* (
SYL)
*
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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ULA)
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ULA)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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ULA)
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ULA)
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SYL)
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SYL)
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243285 Fauvaud
*
243320 Jackuipers
*
*
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*
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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249520 Luppino
* (
SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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264061 Vitebsk
*
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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278447 Saviano
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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ULA)
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ULA)
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SYL)
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SYL)
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SYL)
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SYL)
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ULA)
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ULA)
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SYL)
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ULA)
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SYL)
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SYL)
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SYL)
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ULA)
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See also
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References
{{DEFAULTSORT:Cybele Asteroid
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