Kuiper Belt

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Illustration of the Kuiper belt's location

A ring consisting of many thousands of minor planets which lies beyond the orbit of Neptune and which was named after the Dutch-American astronomer Gerard Kuiper (1905-1973). Kuiper conjectured about its existence in the 1940s. Astronomers continue to find new heavenly bodies in the Kuiper Belt since its discovery in 1992. They can still only speculate about many of its qualities because direct observation of the individual bodies remains extremely difficult. The Kuiper Belt has been compared to the belt of asteroids between Mars and Jupiter but it is much larger and its objects are probably composed primarily of frozen ice of different types, rather than rock or metal.

Pluto is the most familiar member of the Kuiper Belt, and the second largest known after the dwarf planet Eris.

Kuiper Belt Objects (KBOs)

Asteroid
(Number, Name)
Type Date of discovery,
Photographic proof (UT), Place
Diameter[1]
+ Moon(s)
Perihelion q
Aphelion Q[2]
Orbital Period[3][2] Degree of
Perihelion (ca.)[2]
134340
Pluto
Plutoid 18.2.1930 23:00
Flagstaff (AZ)
2.370 km
+ 1.208 km + ca. 45 km + ca. 35 km + ca. 30 km + ca. 20 km
q Sep 1989 29.658 AU 247.68 a 15° Sco.gif
58534
Logos
Cubewano 4.2.1997 13:08:16
Mauna Kea (HI)
82 + 67 km q Oct 1964 39.706 AU
Q Dec 2115 50.355 AU
302.18 a 18° Can.gif
19521
Chaos
Cubewano 19.11.1998 9:52:09
Kitt Peak, Tucson (AZ)
600 km Q Sep 1878 50.582 AU
q Nov 2033 41.059 AU
310.17 a 15° Can.gif
38083
Rhadamanthus
Plutino (?) 17.4.1999 3:19:53
Kitt Peak, Tucson (AZ)
201 km q May 1948 32.885 AU
Q Jul 2069 44.843 AU
242.28 a 28° Gem.gif
53311
Deucalion
Cubewano 18.4.1999 4:55:55
Kitt Peak, Tucson (AZ)
211 km Q Mar 1921 46.776 AU
q Mar 2067 41.212 AU
291.81 a 25° Cap.gif
66652
Borasisi
Cubewano 18.09.1999 7:15:46
Mauna Kea (HI)
165 km q Jan 1972 40.037 AU
Q Jun 2118 48.123 AU
292.67 a 16° Cap.gif
38628
Huya
Plutino 10.3.2000 7:24:56
Mérida, Venezuela
389 + 202 km q Mar 2015 28.522 AU
Q Oct 1891 50.225 AU
247.07 a 25° Sco.gif
20000
Varuna
Cubewano 28.11.2000 9:51:38
Kitt Peak, Tucson (AZ)
785 km q Nov 1930 40.494 AU
Q Aug 2071 45.313 AU
281.03 a Ari.gif
28978
Ixion
Plutino 22.05.2001 5:21:24
Cerro Tololo, Chile
727 km Q Jul 1946 49.308 AU
q Nov 2070 29.848 AU
248.99 a 15° Ari.gif
88611
Teharonhiawako
Cubewano 20.08.2001 3:01:28
Cerro Tololo, Chile
167 + 120 km q Jun 1892 43.299 AU
Q Sep 2039 45.266 AU
294.68 a 10° Lib.gif
148780
Altjira
Cubewano 20.10.2001 9:23:29
Kitt Peak, Tucson (AZ)
212 km q May 1918 41.573 AU
Q Feb 2066 47.145 AU
295.45 a Aqu.gif
50000
Quaoar
Cubewano 4.6.2002 5:41:40
Palomar Mountain (CA)
1170 km Q Sep 2070 45,169 AU
q Mar 1927 42,008 AU
285.97 a 11° Vir.gif
84522
2002 TC302
TNO/ SDO 9.10.2002 5:09:58
Palomar Mountain (CA)
1.150 km Q Oct 1851 71.870 AU
q Oct 2058 39.199 AU
413.86 a 16° Can.gif
65489
Ceto
SDO 22.3.2003 6:39:23
Palomar Mountain (CA)
165 km q Jul 1989 17.795 AU
Q 181.556 AU
995,16 a 13° Leo.gif
136199
Eris
Plutoid/ SDO 21.10.2003 6:25:09
Palomar Mountain (CA)
2.326 km q Jan 1698 38.540 AU
Q Oct 1978 97.557 AU
556,97 a 14° Lib.gif
90377
Sedna
TNO 14.11.2003 6:32:57
Palomar Mountain (CA)
995 km q Aug 2075 76.361 AU
Q 960.782 AU
11.222 a Can.gif
90482
Orcus
Plutino 17.2.2004 5:42:49
Palomar Mountain (CA)
814 + 363 km q Apr 1897 30,639 AU
Q Nov 2019 48,046 AU
246,8 a 11° Pis.gif
120347
Salacia
Cubewano 22.9.2004 3:30:48
Palomar Mountain (CA)
896 + 308 km[4] Q 46,5 AU
q 37.4 AU
271,9 a
136108
Haumea
Plutoid 28.12.2004 0:40:40
Observatorio de Sierra
Nevada (SPA)
1.150 x 2.200 km
+ 310 km + 160 km
Q Feb 1991 51.524 AU
q Oct 2133 35.159 AU
285,3 a 29° Pis.gif
136472
Makemake
Plutoid 31.3.2005 6:13:30
Palomar Mountain (CA)
1.473 km q Nov 1879 38,543 AU
Q Jun 2034 52,778 AU
308,54 a 17° Ari.gif
225088
2007 OR10
SDO 17.7.2007 9:27:35
Palomar Mountain (CA)
1.535[5] q Aug 1856 33.675 AU
Q Sep 2132 100.910 AU
552.52 a 29° Vir.gif (?)

See also

Weblinks

Notes and References