Astronomical parameters of all known centaurs,
discovered to Feb. 10, 2004

Name & preliminary designation Period, years

Semimajor axis of orbit, AU

Distance from Sun in comparison with planets (perihelion - aphelion)

Approx. diameter
Chiron (1977 UB)
50.4 13.64 Saturn - Uranus 170 km
Pholus (1992 AD)
92.2 20.41 Saturn - Neptune/Pluto 186 km
Nessus (1993 HA2)
121.2 24.49 Saturn/Uranus - Pluto  56 km
1994 TA
68.7 16.77 Saturn/Uranus - Uranus/Neptune 24 km

Hylonome (1995 DW2)

125.9 25.12 Uranus - Neptune 117 km
Asbolus (1995 GO)
75.9 17.92 Jupiter/Saturn - Uranus/Neptune 74 km
1995 SN55* 114 23.56 Jupiter - Pluto 307 km
1996 AR20* 59.2 15.20 Jupiter - Uranus/Neptune 7 km
1996 AS20* 214 35.79 ** Saturn/Uranus - Kuiper belt 66 km
1996 RX33*

117

23.87 Uranus - Uranus/Neptune 63 km
Chariklo (1997 CU26)
63.2 15.86 Saturn/Uranus - Uranus 302 km
1998 BU48 194.0 33.51 ** Uranus/Neptune - Kuiper belt 169 km
Pelion (1998 QM107)
89.0 19.94 Uranus 39 km
Okyrhoe (1998 SG35)
24.4 8.40 Jupiter - Saturn 26 km
Cyllarus (1998 TF35)
134.2 26.21 Saturn/Uranus - Pluto 64 km
1999 HD12*
98.5 21.32 Saturn - Neptune 13 km
1999 JV127*
68.4 16.72 Saturn - Uranus/Neptune 33 km
1999 OX3
181.6 32.06 ** Uranus - Kuiper belt 203 km
1999 TD10
943 96.23 Saturn/Uranus - beyond Kuiper belt 81 km
Elatus (1999 UG5) 40.8 11.85 Jupiter/Saturn - Saturn/Uranus 45 km
1999 XX143 76.3 18.00 Saturn - Uranus/Neptune 92 km
2000 CO104 119.6 24.27 Uranus/Neptune 47 km
2000 EC98

35.3

10.75 Jupiter - Saturn/Uranus

59 km

2000 FZ53

116.6

23.86 Saturn/Uranus - Neptune/Pluto 24 km
2000 GM137

22.1

7.88 Jupiter/Saturn 6 km
2000 QB243 204.2 34.68 ** Saturn/Uranus - Kuiper belt 115 km
Bienor (2000 QC243) 66.8 16.47 Saturn/Uranus - Uranus 141 km
2000 SN331* 76.3 17.99 Saturn/Uranus - Uranus/Neptune  24 km
2001 BL41

30.6

9.79 Jupiter/Saturn - Saturn/Uranus

21 km

2001 KF77

132.8

26.03 Uranus - Neptune

62 km

Thereus (2001 PT13)

34.6

10.62 Saturn

74 km

2001 SQ73

72.8

17.44 Saturn/Uranus - Uranus

57 km

2001 XA255

166.2

30.23 Saturn - Kuiper belt

27 km

2001 XZ255

64.1

16.01 Saturn - Uranus

28 km

2002 CA249*

94.3

20.71 Saturn/Uranus - Neptune

19 km

2002 CB249*

152

28.42 Saturn/Uranus - Pluto

47 km

2002 CR46*

237

38.34 Uranus - Kuiper belt

210 km

2002 DH5

104.7

22.22 Saturn/Uranus - Neptune

44 km

2002 FY36*

156

28.97 Uranus/Neptune - Neptune/Pluto

99 km

2002 GO9

85.9

19.48 Saturn/Uranus - Uranus/Neptune

93 km

2002 GB10

126.6

25.22 Saturn/Uranus - Pluto

128 km

2002 GZ32

111.4

23.15 Uranus - Uranus/Neptune

193 km

2002 KY14*

45.4

12.72 Saturn - Saturn/Uranus

50 km

2002 PN34

170.5

30.74 ** Saturn/Uranus - Kuiper belt

107 km

2002 PQ152

129.6

25.61 Saturn - Saturn/Uranus

92 km

2002 QX47*

82.3

18.91 Uranus

91 km

2002 TK301*

64.6

16.10 Saturn/Uranus

10 km

2002 VR130*

111

23.06 Saturn/Uranus - Neptune

31 km

2002 VG131*

73.1

17.49 Saturn/Uranus - Uranus

27 km

2003 CO1

95.9

20.94 Saturn - Neptune

82 km

2003 KQ20*

34.3

10.56 Saturn

11 km

2003 LH7*

69.9

16.96 Saturn/Uranus - Uranus/Neptune

15 km

2003 QC112

104

22.05 Saturn/Uranus - Uranus/Neptune

85 km

2003 QD112*

77.0

18.10 Jupiter/Saturn - Uranus /Neptune

33 km

2003 QN112*

126

25.12 Saturn/Uranus - Neptune/Pluto

12 km

2003 QP112*

97.1

21.13 Saturn/Uranus - Neptune

13 km

2003 UA118*

41.0

11.90 Saturn - Saturn/Uranus

30 km

2003 UW292*

77.1

18.11 Saturn/Uranus - Uranus

99 km

2003 UY292*

102

21.86 Saturn/Uranus - Uranus/Neptune

41 km

2003 WL7*

133

26.06 Saturn - Pluto

71 km

 

Elements of orbits of all known centaurs

Data of discovery of all known centaurs


Note 1. If a centaur is marked by asterisk, it denotes an insufficient quantity of observations. New observations can to change the data of this table essentially.

Note 22. The Minor Planet Center (USA) proposed to assign the name "centaurs" to the objects with perihelion beyond the orbit of Jupiter (q>5.2AU) and with semimajor axis inside the orbit of Neptune (a<30.06AU). If to obey this rule, BU48, OX3, AS20, QB243 and PN34 desist to be centaurs, because their semimajor axes are bigger than one of Neptune.

Note 3. At first, astronomers estimate the period of the minor planet 1999 TD10 as 87 years. But then it developed that 1999 TD10 is not a centaur: this minor planet has a very elongate comet-like orbit and, hereby, belongs to SDO group (Scattered-Disk Objects). Similarly, asteroids 2001 XA255 and 2002 CR46 were taken at first for centaurs, which move near the orbit of Uranus, but following observations proved that XA255 in perihelion reaches the orbit of Saturn and in aphelion moves away in the Kuiper belt; and CR46 in the ultimate withdrawal goes even farther than cardinal cubewanos. So,  XA255 and CR46 are relegated now to SDOs too.


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