As of 2026-06-03, Ceres tops the list with 939 km.
- #1 Ceres — 939 km
dwarf planet in the Solar System and largest asteroid of the main asteroid belt
Ceres is a dwarf planet in the main asteroid belt between the orbits of Mars and Jupiter. It was the first object identified in the asteroid belt, discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily, and announced as a new planet. Ceres was later classified as an asteroid, and then more recently as the only confirmed dwarf planet within the asteroid belt, and the largest without a moon. In the minor planet numbering system, its designation is 1 Ceres or... Read more on Wikipedia.
Wikidata - #2 2021 DR15 — 850 km
TNO
The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2021. As of May 2026, it contains a total of 123 bodies. For more information see the description on the main page. Also see list for the previous and next year. Read more on Wikipedia.
Wikidata - #3 120347 Salacia — 840 km
trans-Neptunian object
120347 Salacia (provisional designation 2004 SB60) is a large trans-Neptunian object in the Kuiper belt. It was discovered on 22 September 2004 by American astronomers Henry G. Roe, Michael E. Brown, and Kristina Barkume using the Hale Reflector at the Palomar Observatory. Its discovery was officially announced in May 2005. Salacia orbits the Sun at an average distance slightly greater than that of Pluto, and is classified as a hot cubewano or a scattered–extended object. It was named after... Read more on Wikipedia.
Wikidata - #4 208996 Achlys — 770 km
trans-Neptunian object
208996 Achlys (provisional designation 2003 AZ84) is a large trans-Neptunian object orbiting the Sun in the Kuiper belt, a region of icy bodies beyond Neptune. It was discovered on 13 January 2003 by Chad Trujillo and Michael E. Brown at Palomar Observatory. Achlys has an elongated shape that is believed to be distorted by its rapid 6.8-hour rotation. Its diameter is estimated to be roughly 940 km (580 mi) across its equator to 490 km (300 mi) across its poles. After Pluto and Orcus, Achlys... Read more on Wikipedia.
Wikidata - #5 532037 Chiminigagua — 742 km
Trans-Neptunian object
532037 Chiminigagua (provisional designation 2013 FY27) is a large trans-Neptunian object in the scattered disc. It was discovered on 17 March 2013 by Scott Sheppard and Chad Trujillo at Cerro Tololo Observatory in Chile. Chiminigagua has a nominal diameter of about 740 km (460 mi), which is large enough that some astronomers consider it a possible dwarf planet. Read more on Wikipedia.
Wikidata - #6 174567 Varda — 740 km
trans-Neptunian object
174567 Varda (provisional designation 2003 MW12) is a large binary trans-Neptunian object in the hot classical population of the Kuiper belt, located in the outermost region of the Solar System. Its moon, Ilmarë, was discovered in 2009. Read more on Wikipedia.
Wikidata - #7 (523794) 2015 RR245 — 674 km
trans-Neptunian object
(523794) 2015 RR245 is a large trans-Neptunian object of the Kuiper belt in the outermost regions of the Solar System. It was discovered on 9 September 2015, by the Outer Solar System Origins Survey at Mauna Kea Observatories on the Big Island of Hawaii, in the United States. The object is in a rare 2:9 resonance with Neptune and probably measures somewhere between 500 and 900 kilometres in diameter. Read more on Wikipedia.
Wikidata - #8 55637 Uni — 670 km
trans-Neptunian object
55637 Uni (provisional designation 2002 UX25) is a large trans-Neptunian object that orbits the Sun in the Kuiper belt beyond Neptune. It briefly garnered scientific attention when it was found to have an unexpectedly low density of about 0.82 g/cm3. Read more on Wikipedia.
Wikidata - #9 145451 Rumina — 644 km
trans-Neptunian object
145451 Rumina (provisional designation 2005 RM43) is a large trans-Neptunian object in the scattered disc region beyond the Kuiper belt. It was discovered on 9 September 2005, by American astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico. Read more on Wikipedia.
Wikidata - #10 229762 Gǃkúnǁʼhòmdímà — 640 km
trans-Neptunian object
229762 Gǃkúnǁʼhòmdímà (provisional designation 2007 UK126) is a large binary trans-Neptunian object and dwarf planet candidate in the scattered disc, located in the outermost region of the Solar System. It was discovered on 19 October 2007 by American astronomers Megan Schwamb, Michael Brown, and David Rabinowitz at the Palomar Observatory in California. Read more on Wikipedia.
Wikidata