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Encyclopedia > Asteroids VI

ASTEROIDS : CENTAURS AND SCATTERED OBJECTS

Centaurs are asteroids whose orbit lies between Jupiter and Neptune. Scattered objects are asteroids that can travel beyond the orbit of Neptune without any resonance with this planet. To the present date (Janvier 15, 2022), we found 1396 such objects (including 389 confirmed and numbered). Their orbits are not stable: they are highly elliptical and are very disturbed by the giant planets.

It is believed that these objects look like comets, with a composition of ice and rocks. Some, however, are very large as Sedna and Eris whose size is of the order of 1600 to 2400 km, making them the largest asteroids known at the present date.


Some Centaurs and "scattered objects"

Some Centaurs and "scattered objects" ordered from the larger ones until the more recently discovered. 

Number Name Size 
in km
 Distance from Sun  
in AU
 eccentricity   Inclination   Date of 
discovery
2060 Chiron 170 8.44/18.76 0.379 1977
5145 Pholus 175 8.65/31.83 0.573 25° 1992
7066 Nessus 55 11.80/37.05 0.517 16° 1993
8405 Absolus 67 6.83/29.08 0.619 18° 1995
10199 Chariklo 210 13.07/18.44 0.170 23° 1997
10370 Hylonome 110 18.85/30.93 0.243 1995
15874 1996 TL66  340 35.03/134 0.586 24° 1996
38084 1999 HB129 160 32.61/78.52 0.413 13° 1999
121725 1999 XX143 85 8.49/24.97 0.492 1999
87269 2000 OO67 70 20.76/1099 0.963 20° 2000
42301 2001 UR163 425 36.8/45.8 0.283 0.8° 2001
84522 2002 TC302 700 39/71 0.293 35° 2002
55576 2002 GB10 130 12.34/29.92 0.416 14° 2002
90377 Sedna 1600 76/914 0.848 12° 2003
136199 Eris 2400 38/97  560 44° 2003
184212 2004 PB112 130 35/206 0.712 15° 2004
413666 2005 VJ119 19 11/61 0.690 2005
- 2006 HV122 160 37/123 0.533 16° 2006
- 2006 HH123 250 30/82 0.464 44° 2006
- 2008 ST291 400 43/157 0.573 721° 2008
471143 2010 EK139 500 33/105 0.529 29° 2010
- 2013 BK78 8 8/71 0.792 2005