Asteroids discovered on January 21
48 named asteroids.
| # | Asteroid | Discovered | Discoverer |
|---|---|---|---|
| 1 | (356) Liguria | 1893-01-21 | A. Charlois |
| 2 | (1382) Gerti | 1925-01-21 | K. Reinmuth |
| 3 | (4808) Ballaero | 1925-01-21 | K. Reinmuth |
| 4 | (4635) Rimbaud | 1988-01-21 | E. W. Elst |
| 5 | (4946) Askalaphus | 1988-01-21 | Shoemaker, C. S., Shoemaker, E. M. |
| 6 | (5027) Androgeos | 1988-01-21 | C. S. Shoemaker |
| 7 | (4458) Oizumi | 1990-01-21 | Kushida, Y., Muramatsu, O. |
| 8 | (4951) Iwamoto | 1990-01-21 | Mizuno, Y., Furuta, T. |
| 9 | (5330) Senrikyu | 1990-01-21 | A. Sugie |
| 10 | (5435) Kameoka | 1990-01-21 | A. Sugie |
| 11 | (5825) Rakuyou | 1990-01-21 | A. Sugie |
| 12 | (6389) Ogawa | 1990-01-21 | Endate, K., Watanabe, K. |
| 13 | (6391) Africano | 1990-01-21 | E. F. Helin |
| 14 | (6517) Buzzi | 1990-01-21 | E. F. Helin |
| 15 | (8492) Kikuoka | 1990-01-21 | T. Seki |
| 16 | (11284) Belenus | 1990-01-21 | A. Maury |
| 17 | (11503) Isobeken | 1990-01-21 | Mizuno, Y., Furuta, T. |
| 18 | (11504) Kazo | 1990-01-21 | Hioki, T., Hayakawa, S. |
| 19 | (35076) Yataro | 1990-01-21 | T. Seki |
| 20 | (12282) Crombecq | 1991-01-21 | E. W. Elst |
| 21 | (23478) Chikumagawa | 1991-01-21 | T. Seki |
| 22 | (9064) Johndavies | 1993-01-21 | Spacewatch |
| 23 | (14918) Gonzalezalegre | 1994-01-21 | O. A. Naranjo |
| 24 | (20132) Huangwei | 1996-01-21 | Beijing Schmidt CCD Asteroid Program |
| 25 | (24858) Diethelm | 1996-01-21 | Wolf, M., Pravec, P. |
| 26 | (48681) Zeilinger | 1996-01-21 | Meyer, E., Obermair, E. |
| 27 | (18596) Superbus | 1998-01-21 | V. S. Casulli |
| 28 | (27178) Quino | 1999-01-21 | ODAS |
| 29 | (29736) Fichtelberg | 1999-01-21 | J. Kandler |
| 30 | (29737) Norihiro | 1999-01-21 | A. Nakamura |
| 31 | (31429) Diegoazzaro | 1999-01-21 | V. S. Casulli |
| 32 | (31431) Cabibbo | 1999-01-21 | Osservatorio San Vittore |
| 33 | (35683) Broumov | 1999-01-21 | Klet |
| 34 | (53141) Marcmoniez | 1999-01-21 | ODAS |
| 35 | (79900) Coreglia | 1999-01-21 | S. Donati |
| 36 | (152750) Brloh | 1999-01-21 | Ticha, J., Tichy, M. |
| 37 | (28957) Danielfulop | 2001-01-21 | LINEAR |
| 38 | (107223) Ripero | 2001-01-21 | R. Ferrando |
| 39 | (199261) Cassandralejoly | 2006-01-21 | Spacewatch |
| 40 | (224693) Morganfreeman | 2006-01-21 | V. S. Casulli |
| 41 | (265924) Franceclemente | 2006-01-21 | |
| 42 | (262876) Davidlynch | 2007-01-21 | J.-C. Merlin |
| 43 | (266286) Bodenmuller | 2007-01-21 | W. Ries |
| 44 | (361450) Houellebecq | 2007-01-21 | J.-C. Merlin |
| 45 | (383492) Aubert | 2007-01-21 | J.-C. Merlin |
| 46 | (590377) Lisacampbell | 2007-01-21 | K. M. Perrett D. D. Balam |
| 47 | (263844) Johnfarrell | 2009-01-21 | J. Hobart |
| 48 | (438829) Visena | 2009-01-21 |