21001–21100
| 21001 Trogrlic || 1987 GF || Yvan, Marie, Jean, Émilienne, Yvonne and Liliane Trogrlic, respectively grandfather, grandmother, uncle, mother and aunts of the discoverer || |-id=m004 | 21004 Thérèsemarjou || || Barbe-Thérèse Marjou (born 1755), wife of Pierre Méchain, a French astronomer. || |-id=m007 | 21007 Lo Campo || || Lo Campo (born 1965), Italian scientific journalist covering astronautics and astronomy || |-id=m008 | 21008 Ottewell || 1988 PE || Guy Ottewell, British educator who published his Astronomical Calendar every year from 1974 to 2026. || |-id=m009 | 21009 Agilkia || || Agilkia, the name of an island on the Nile in Egypt. || |-id=m010 | 21010 Kishon || || Ephraim Kishon, Israeli author, journalist, satirist, and script-writer || |-id=m011 | 21011 Johannaterlinden || || Johanna Helena Terlinden (1920-1989), wife of Dutch astronomer Theodore Walraven. || |-id=m014 | 21014 Daishi || || Daishi grade school, Kōchi, Japan, attended by the discoverer 1937–1943 || |-id=m015 | 21015 Shigenari || 1988 UF || Shigenari Oonishi (born 1946) is a famous illustrator, who has designed many record covers. He opened his private art museum, Shigechan Land, in his hometown (Tsubetsu town, Hokkaido, Japan) in 2001. || |-id=m016 | 21016 Miyazawaseiroku || 1988 VA || Seiroku Miyazawa, Japanese publisher, brother of Kenji Miyazawa, the author of Night On The Milky Way Train and The Twin Stars || |-id=m022 | 21022 Ike || 1989 CR || Koichi Ike, Japanese friend and assistant of the discoverer || |-id=m029 | 21029 Adorno || || Theodor W. Adorno (1903–1969), German philosopher and musicologist, was a leading figure in the Frankfurter Schule of critical theory. || |-id=m033 | 21033 Akahirakiyozo || 1989 UM || Kiyozo Akahira (born 1941) is a science historian and an amateur astronomer. He has been a high school teacher of physics for more than 35 years. || |-id=m035 | 21035 Iwabu || 1990 AE || Shimeichi Iwabu (born 1914) became enthralled with total eclipses after witnessing his first in Hokkaido in 1963. || |-id=m036 | 21036 Nakamurayoshi || || Yoshihiro Nakamura (born 1947) retired from his planetarium manufacturing company in 2007 and is now well known as an amateur astronomer in Chiba Prefecture. || |-id=m038 | 21038 Bazzano || || Angela Bazzano, Italian astrophysicist. || |-id=m039 | 21039 Zank || || Gary Zank, American space physicist. || |-id=m040 | 21040 Güntherreitz || 1990 OZ || Günther Reitz, German biophysicist. || |-id=m041 | 21041 Wangjinsong || || Wang Jinsong, Chinese space physicist and meteorologist. || |-id=m042 | 21042 Sibeck || || David Gary Sibeck, American space physicist. || |-id=m043 | 21043 Pascalwillis || || Pascal Willis, French geodesist. || |-id=m044 | 21044 Rummel || || John Rummel, American exobiologist. || |-id=m045 | 21045 Juangabriel || || Juan Carlos Gabriel, Argentinean-German high-energy physicist who has been engaged with COSPAR’s Panel on Capacity Building activities for 25 years as lecturer, Vice-Chair, and then Chair. || |-id=m047 | 21047 Hodierna || || Giovanni Batista Hodierna, Italian (Sicilian) mathematician and astronomer. || |-id=m050 | 21050 Beck || || Hans G. Beck, German astronomer and head of the department for astronomical instruments of Carl Zeiss, Jena || |-id=m054 | 21054 Ojmjakon || || The coldest city on earth, Ojmjakon, lies in the Republic of Yakutia (Siberia, Russia), in the valley of the upper Indigirka river, at 740 metres above sea level. With an average temperature of -48oC in January, it has a lowest record of -70oC. || |-id=m057 | 21057 Garikisraelian || || Garik Israelian (born 1963), an astrophysicist at the Institute of Astrophysics, Tenerife, known for his studies of stellar abundances and observational evidence of the supernova origin of black holes. || |-id=m059 | 21059 Penderecki || || Krzysztof Penderecki, Polish composer and conductor || |-id=m062 | 21062 Iasky || || Robert Iasky (born 1956), geophysicist with the Geological Survey of Western Australia, discovered the 120 km-diameter late Devonian Woodleigh impact structure in the Carnarvon Basin. In addition, he has found other probable impact structures, one in the Carnarvon Basin and two in the western Officer Basin. || |-id=m064 | 21064 Yangliwei || || Yang Liwei, first Chinese citizen in space † || |-id=m065 | 21065 Jamesmelka || 1991 NM || James Melka (born 1942), an amateur astronomer. || |-id=m073 | 21073 Darksky || 1991 RE || Part of a worldwide initiative, Dark Sky Scotland promotes the use of Scotland's dark rural areas for astronomy outreach. Its events encourage the public to enjoy the night sky and learn how astronomers are exploring the wonders of the Universe || |-id=m074 | 21074 Rügen || || The island of Rügen in the Baltic Sea, a popular resort || |-id=m075 | 21075 Heussinger || || Adalbert Heussinger, Austrian Catholic Minorite, theologian and philosopher || |-id=m076 | 21076 Kokoschka || || Oskar Kokoschka, Austrian Expressionist painter and poet || |-id=m082 | 21082 Araimasaru || || Masaru Arai, Japanese amateur astronomer, discoverer of comet C/1991 A2 || |-id=m087 | 21087 Petsimpallas || || Peter Simon Pallas, 18th/19th-century German naturalist and explorer, discoverer of pallasites, Pallas's cat and several other animals and plants || |-id=m088 | 21088 Chelyabinsk || || Chelyabinsk, a city in the Urals, Siberia. || |-id=m089 | 21089 Mochizuki || 1992 CQ || Seiji Mochizuki, Japanese designer of the 0.6-m reflector at Geisei Observatory ||
21101–21200
|-id=m104 | 21104 Sveshnikov || 1992 PY || Mikhail Leonidovich Sveshnikov (born 1941) is a well-known expert in celestial mechanics and astrometry. He is Editor-in-Chief of the Russian Naval Astronomical Almanac. From 2001 to 2004, he headed the Laboratory of the astronomical yearbooks of the Institute of Applied Astronomy of the Russian Academy of Sciences || |-id=m109 | 21109 Sünkel || 1992 RY || Hans Sünkel (born 1948), an Austrian mathematical geodesist and geoinformatician || |-id=m110 | 21110 Karlvalentin || || Karl Valentin (1882–1948), German (Bavarian) actor, comedian, and writer || |-id=m114 | 21114 Bernson || || Reysa Bernson (1904–1944) had a passion for science and after an encounter with Flammarion, who inspired her for astronomy, she founded the Astronomical Association of the North. During the 1937 Universal Exposition she directed the Paris planetarium.This led to the foundation of many new planetaria. || |-id=m117 | 21117 Tashimaseizo || || Seizo Tashima (born 1940) is well known as an author of illustrated books. He has won many national and international prizes for his books and pictures. || |-id=m118 | 21118 Hezimmermann || || (1926–2011), a German astronomer and director of the Jena Observatory from 1969 to 1978. His research included the interstellar medium and the collision of clouds. He was instrumental in the new study course of astronomy for student teachers in Germany. || |-id=m120 | 21120 Naritaatsushi || || Atsushi Narita (born 1951), a Japanese amateur astronomer. He is known for his two-point observational pictures of meteors. || |-id=m121 | 21121 Andoshoeki || 1992 WV || Andō Shōeki (1703–1762) was a doctor and one of the foremost philosophers of early modern Japan. He desired to create an equal and peaceful symbiotic society based on people's mutual aid. || |-id=m125 | 21125 Orff || || Carl Orff (1895–1982), German composer, best known for his Carmina Burana || |-id=m126 | 21126 Katsuyoshi || || Katsuyoshi Yoshimi (born 1951) is an amateur astrophotographer and has contributed to many minor-planet discoveries at Geisei Observatory by hyper-sensitizing films for use at the observatory || |-id=m128 | 21128 Chapuis || || Grégoire Chapuis (1761–1794), Belgian surgeon and educator, mayor of Verviers, beheaded for blasphemy for his promotion of civil weddings || |-id=m148 | 21148 Billramsey || || William ("Bill") D. Ramsey, American amateur astronomer who assisted in organizing the photographic glass plate archive of the 1.2-m Schmidt Oschin Telescope at Palomar Observatory || |-id=m149 | 21149 Kenmitchell || || Ken Mitchell, Australian geological field assistant for the Australian Geological Survey Organization and other exploration groups, who discovered the shatter cones at Lawn Hill, Queensland, and at Amelia Creek in the Davenport Ranges of the Northern Territory || |-id=m160 | 21160 Saveriolombardi || 1993 TJ || An expert in physics and mathematics, Saverio Lombardi (born 1924) has always shared his knowledge and experience with the astronomers at St. Lucia || |-id=m161 | 21161 Yamashitaharuo || || Haruo Yamashita (born 1937) is the author of more than 500 works including novels and children's stories. He has been awarded many prizes including the Medal with Purple Ribbon from the Emperor of Japan. || |-id=m166 | 21166 Nobuyukishouji || 1993 XH || Nobuyuki Maeda (born 1957) and Shouji Higasioka (born 1958) are brothers living in Aki city in Kochi prefecture. Nobuyuki, formerly a high school teacher, teaches astronomy at Geisel Observatory. Shouji is a comet hunter and volunteers for astronomy outreach activities. || |-id=m182 | 21182 Teshiogawa || || Teshio River (Teshio-gawa) is a 256-km long river which runs through the northern part of Hokkaido into the Sea of Japan. Nayoro Observatory, equipped with the 1.6-m Pirka telescope, is located near this river. || |-id=m187 | 21187 Setsuo || 1994 FY || Setsuo Fukushima (born 1961) was moved by astronomical images he first saw in middle school. His work as a volunteer lecturer at the Children's Astronomical Classroom at the Takamatsu City Planetarium spans over ten years. || |-id=m188 | 21188 Kiyohiro || 1994 GN || Kiyohiro Kozai (born 1964) is well known as an enthusiastic amateur astronomer in Kagawa Prefecture. He is a popular lecturer to the families that come to hear him at the astronomical classrooms of his local community center. || |-id=m189 | 21189 Robertonesci || || Roberto Nesci (b. 1949), a former Italian professor of astrophysics at La Sapienza University of Rome. || |-id=m190 | 21190 Martamaffei || || Marta Maffei (b. 1957), the founder of a cultural center for the promotion of scientific studies dedicated to her father, the Italian astronomer Paolo Maffei. || |-id=m192 | 21192 Seccisergio || 1994 NA || Sergio Secci (1956–1980) was a researcher and author who graduated with top honors at the University of Bologna ||
21201–21300
|-id=m219 | 21219 Mascagni || || Pietro Mascagni (1863–1945), an Italian conductor and composer. || |-id=m229 | 21229 Sušil || || František Sušil, Czech folklorist † || |-id=m234 | 21234 Nakashima || 1995 WG || Takashi Nakashima, Japanese amateur astronomer, member of the Kumamoto Civil Astronomical Observatory || |-id=m236 | 21236 Moneta || || Ernesto Teodoro Moneta (1833–1918) was an Italian journalist, revolutionary soldier and later a pacifist. He won the 1907 Nobel Peace Prize “for his work in the press and in peace meetings, both public and private, for an understanding between France and Italy.” His motto ‘In varietate unitas!’ later inspired the motto of the European Union. || |-id=m237 | 21237 Suematsu || || Kenji Suematsu (born 1966) teaches physics and earth sciences as a high school teacher in Nagasaki Prefecture. He is an enthusiastic teacher for students of all grades, from elementary through high school, and shows a particular passion for lectures on astronomy. || |-id=m238 | 21238 Panarea || || Panarea, a volcanic island placed in the south of Italy. || |-id=m250 | 21250 Kamikouchi || || Kamikouchi, a Japanese scenic point nominated as a "Special Natural Treasure" in 1952 || |-id=m254 | 21254 Jonan || || Jonan, Kumamoto, Japan, where the Kumamoto Civil Astronomical Observatory is located, on the occasion of the observatory's twentieth anniversary || |-id=m256