As of 2026-10-12, 167P/CINEOS tops the list with 70,000 m.
- #1 167P/CINEOS — 70,000 m
comet
167P/CINEOS, also known as P/2004 PY42, is a large periodic comet and active, grey centaur, approximately 66 kilometers (41 miles) in diameter, orbiting the Sun outside the orbit of Saturn. It was discovered on August 10, 2004, by astronomers with the CINEOS survey at Gran Sasso in Italy. It is one of only a handful known Chiron-type comets. Read more on Wikipedia.
Wikidata - #2 29P/Schwassmann–Wachmann — 60,000 m
comet
Comet 29P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 1, was discovered on November 15, 1927, by Arnold Schwassmann and Arno Arthur Wachmann at the Hamburg Observatory in Bergedorf, Germany. It is a large comet 60 km in diameter and is known for being observable throughout the whole orbit and having frequent outbursts where it brightens by 2-3 magnitudes. The most recent outbursts were in February 2026, April 2026, and May 2026. The comet came to solar conjunction on 26... Read more on Wikipedia.
Wikidata - #3 60558 Echeclus — 59,000 m
active centaur
60558 Echeclus is a centaur, approximately 60 kilometers (37 miles) in diameter, located in the outer Solar System. It was discovered by Spacewatch in 2000 and initially classified as a minor planet with provisional designation 2000 EC98. Research in 2001 by Rousselot and Petit at the Besançon observatory in France indicated that it was not a comet, but in December 2005 a cometary coma was detected. In early 2006 the Committee on Small Bodies Nomenclature (CSBN) gave it the cometary... Read more on Wikipedia.
Wikidata - #4 28P/Neujmin — 21,400 m
comet
28P/Neujmin, also known as Neujmin 1, is a large 21-km periodic comet that orbits the Sun once every 18 years. With a perihelion distance of 1.6 AU (240 million km), this comet does not get closer than about 0.571 AU (85.4 million km) from Earth. Read more on Wikipedia.
Wikidata - #5 Halley's Comet — 11,000 m
short-period comet visible from Earth every 75–76 years
Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing roughly every 74–79 years. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Officially designated 1P/Halley, it is also commonly called Comet Halley, or sometimes simply Halley. Read more on Wikipedia.
Wikidata - #6 65P/Gunn — 10,800 m
comet
65P/Gunn is a Jupiter-family comet orbiting the Sun every 7.67 years inside the main asteroid belt between the orbits of the planets Mars and Jupiter. Read more on Wikipedia.
Wikidata - #7 10P/Tempel — 10,600 m
comet
10P/Tempel, also known as Tempel 2, is a large Jupiter-family comet roughly 10 km in diameter with a 5.4 year orbit around the Sun. It was discovered on 4 July 1873 by Wilhelm Tempel. Read more on Wikipedia.
Wikidata - #8 99P/Kowal — 10,200 m
comet
99P/Kowal, also known as Kowal 1, is a periodic comet in the Solar System that orbits out by Jupiter and has a 15 year orbital period. It has been observed regularly since 2019. Its most recent perihelion occurred in April 2022, and it is expected to return by May 2037. Read more on Wikipedia.
Wikidata - #9 117P/Helin–Roman–Alu — 9,000 m
comet
117P/Helin–Roman–Alu, also known as Helin–Roman–Alu 1, is a Jupiter-family comet with an 8.38-year orbit around the Sun. It is also classified as a quasi-Hilda comet. It is the second of three comets co-discovered by Eleanor F. Helin, Brian P. Roman, and Jeff Alu. Read more on Wikipedia.
Wikidata - #10 49P/Arend–Rigaux — 8,480 m
solar system comet
49P/Arend–Rigaux is a periodic comet with a 6.75-year orbit around the Sun. It is the first of three comets discovered by Belgian astronomer Sylvain Arend and the only one for Fernand Rigaux. Read more on Wikipedia.
Wikidata