As of 2026-04-29, 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 known asteroid, 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 orbit of Neptune and the largest without a moon. 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 October 2025, 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 Q136964 — 840 km
trans-Neptunian object
120347 Salacia (provisional designation 2004 SB60) is a large trans-Neptunian object (TNO) and a possible dwarf planet in the Kuiper belt. Its diameter is estimated to be between 875 km (544 mi) and 800 km (500 mi). Salacia orbits the Sun at an average distance that is slightly greater than that of Pluto. It was named after the Roman goddess Salacia and has one single known moon, Actaea. Salacia and Actaea form a binary system where both bodies are tidally locked to the other, similar to... 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. Chiminigagua has a moderately red color, which suggests it has an old, ice-poor surface that has been dulled by cosmic rays and... Read more on Wikipedia.
Wikidata - #6 Q143133 — 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 Q24297554 — 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 Q155539 — 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. It was discovered on 30 October 2002, by the Spacewatch program. Spitzer Space Telescope results estimate it to be approximately 659 kilometers (409 miles) in diameter. It has one known moon called Tinia, which was discovered in 2005. Read more on Wikipedia.
Wikidata - #9 Q3323791 — 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. It measures approximately 600 kilometers in diameter. 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 and measures approximately 600 kilometers (400 miles) in diameter. This medium-sized TNO appears to be representative of a class of... Read more on Wikipedia.
Wikidata