Table of The Largest KBOs Known
The largest KBOs known, with data for some of them, are listed below. 50 new solar system objects so far have been discovered like Pluto and Eris by 2016, and NASA thinks our solar system could hold dozens of such dwarf planets. The latest such minor planet discovered is 2014 UZ224 (by 2016), at 330-mile (531-kilometer) wide, over 8 billion miles away from the Sun as it takes 1,100 year to complete one orbit, compared, for example, to Pluto with 245 years
 |
| click to a view of the Kuiper Belt and the Oort Cloud |
KBOs (and One Oort Cloud Object)
Other KBOs (only) Objects, with Sparser Data
KBOs (and One Oort Cloud Object)| Name | Date of Discovery | Diameter (in Miles, km in Brackets) | Semimajor Axis (in miles, km in brackets, in AU) | Orbital Period (in Years) | Eccentricity | Inclination (in ° Relative to the Ecliptic) | Remarks |
|---|---|---|---|---|---|---|---|
| Pluto | 1930 | 1,485 (2,390) | 2.7-4.5 billion (4.3-7.2 billion) 29-48 AU | 248 | 0.244 | 17.2 | Pluto has one moon, Charon (diameter: 737 mi -1,186 km) |
| Quaoar | Jun. 2002 | 800 (1,290) | 3.9 billion (6.300 billion) 42 AU | 285? | less than 0.04 | 8 | - |
| 2004 DW | Feb. 2004 | 990 (1,600) | 4.2 billion (6,7 billion) 45 AU | na | na | na | - |
| 2018 VG18 | Dec. 2018 | more than 310 (plus de 500) | 5.5 billion miles (9 billion km) 60 AU | more than 1,000 | na | na | the discovery of that body led to relaunch the question of 'Planet X' |
| 2003 UB313 (Xena, or Eris) | Jan. 2005 | 1,490 (2,397) | 10 billion miles (16 billion km) | 560 | na | 45? | first KBO to be discovered of the size of Pluto. One of the most reflective body in the solar system. Eris' moon has been named 'Dysnomia', the demon goddess of lawlessness and the daughter of Eris |
| Sedna | Nov. 2004 | 1,000 (1,600) | 7-84 billion (11.4-137 billion km) 76-867 AU | 10,500 | highly elliptical | na | coolest object in the solar system; slowest rotation (40 days) in the solar system; might have a moon |
| 2007 OR10 | na | 955 (1,535) | na | na | na | na | the third largest of the current roster of about half a dozen dwarf planets, quite dark and rotating in 45 hours. Most of the known dwarf planets in the Kuiper Belt larger? than 600 miles across have companions hinting to collisions at the time of their formation at a adequate speed must have been frequent, making satellites easier to form |
| 2015 TG387 | na | 170 (300) | 3,8-107 billion miles (6-173 billion km) | na | na | na | na |
A new dwarf planet, dubbed 2015 RR245, with a highly elliptical orbit lasting 700 Earth years to complete came to add, by mid-2016, to the roster of other dwarf planets in our solar system
Other KBOs (only) Objects, with Sparser Data| Name | Diameter | Remarks | |||||
|---|---|---|---|---|---|---|---|
| 2003 EL61 | 746? (1,200?) | - | |||||
| 2005 FY9 | 777? (1,250?) | - | |||||
| Ixion | ab. 662 (1,065) | - | |||||
| 2002 AW197 | ab. 553 (ab. 890) | - | |||||
| Varuna | ab. 559 (ab. 900) | - | |||||
| Farfarout | na | 140 AU, more than 1,000 years to orbit the Sun | |||||
