Asteroids discovered on March 21
90 named asteroids.
| # | Asteroid | Discovered | Discoverer |
|---|---|---|---|
| 1 | (194) Prokne | 1879-03-21 | C. H. F. Peters |
| 2 | (329) Svea | 1892-03-21 | M. F. Wolf |
| 3 | (365) Corduba | 1893-03-21 | A. Charlois |
| 4 | (366) Vincentina | 1893-03-21 | A. Charlois |
| 5 | (402) Chloe | 1895-03-21 | A. Charlois |
| 6 | (631) Philippina | 1907-03-21 | A. Kopff |
| 7 | (803) Picka | 1915-03-21 | J. Palisa |
| 8 | (996) Hilaritas | 1923-03-21 | J. Palisa |
| 9 | (2182) Semirot | 1953-03-21 | Indiana University |
| 10 | (5567) Durisen | 1953-03-21 | Indiana University |
| 11 | (3708) Socus | 1974-03-21 | University of Chile |
| 12 | (2660) Wasserman | 1982-03-21 | E. Bowell |
| 13 | (2709) Sagan | 1982-03-21 | E. Bowell |
| 14 | (3248) Farinella | 1982-03-21 | E. Bowell |
| 15 | (3848) Analucia | 1982-03-21 | H. Debehogne |
| 16 | (5092) Manara | 1982-03-21 | E. Bowell |
| 17 | (7274) Washioyama | 1982-03-21 | T. Seki |
| 18 | (7865) Francoisgros | 1982-03-21 | H. Debehogne |
| 19 | (13003) Dickbeasley | 1982-03-21 | E. Bowell |
| 20 | (3357) Tolstikov | 1984-03-21 | A. Mrkos |
| 21 | (3842) Harlansmith | 1985-03-21 | E. Bowell |
| 22 | (5947) Bonnie | 1985-03-21 | Shoemaker, C. S., Shoemaker, E. M. |
| 23 | (10059) McCullough | 1988-03-21 | Bulgarian National Observatory |
| 24 | (5356) Neagari | 1991-03-21 | Endate, K., Watanabe, K. |
| 25 | (17473) Freddiemercury | 1991-03-21 | H. Debehogne |
| 26 | (5630) Billschaefer | 1993-03-21 | J. B. Child |
| 27 | (6102) Visby | 1993-03-21 | UESAC |
| 28 | (6528) Boden | 1993-03-21 | UESAC |
| 29 | (6796) Sundsvall | 1993-03-21 | UESAC |
| 30 | (6797) Ostersund | 1993-03-21 | UESAC |
| 31 | (7595) Vaxjo | 1993-03-21 | UESAC |
| 32 | (7831) Francois-Xavier | 1993-03-21 | E. F. Helin |
| 33 | (8535) Pellesvanslos | 1993-03-21 | C.-I. Lagerkvist |
| 34 | (8536) Mans | 1993-03-21 | C.-I. Lagerkvist |
| 35 | (8537) Billochbull | 1993-03-21 | C.-I. Lagerkvist |
| 36 | (8538) Gammelmaja | 1993-03-21 | C.-I. Lagerkvist |
| 37 | (8697) Olofsson | 1993-03-21 | UESAC |
| 38 | (9621) Michaelpalin | 1993-03-21 | UESAC |
| 39 | (9622) Terryjones | 1993-03-21 | UESAC |
| 40 | (9623) Karlsson | 1993-03-21 | UESAC |
| 41 | (10124) Hemse | 1993-03-21 | UESAC |
| 42 | (10125) Stenkyrka | 1993-03-21 | UESAC |
| 43 | (10126) Larbro | 1993-03-21 | UESAC |
| 44 | (10127) Frojel | 1993-03-21 | UESAC |
| 45 | (10131) Stanga | 1993-03-21 | UESAC |
| 46 | (10812) Grotlingbo | 1993-03-21 | UESAC |
| 47 | (11081) Persave | 1993-03-21 | UESAC |
| 48 | (11308) Tofta | 1993-03-21 | UESAC |
| 49 | (15311) Vasterberg | 1993-03-21 | UESAC |
| 50 | (15312) Wandt | 1993-03-21 | UESAC |
| 51 | (15313) Ynnerman | 1993-03-21 | UESAC |
| 52 | (20049) Antoniopresti | 1993-03-21 | UESAC |
| 53 | (20050) Aglaonice | 1993-03-21 | UESAC |
| 54 | (20051) Phanostrate | 1993-03-21 | UESAC |
| 55 | (20052) Kellman | 1993-03-21 | UESAC |
| 56 | (20053) Cavefish | 1993-03-21 | UESAC |
| 57 | (20056) Roccati | 1993-03-21 | UESAC |
| 58 | (26858) Misterrogers | 1993-03-21 | E. F. Helin |
| 59 | (12061) Alena | 1998-03-21 | T. Stafford |
| 60 | (18647) Vaclavhubner | 1998-03-21 | P. Pravec |
| 61 | (20254) Upice | 1998-03-21 | P. Pravec |
| 62 | (21420) Steinicke | 1998-03-21 | W. Bickel |
| 63 | (42618) Bardabelias | 1998-03-21 | Spacewatch |
| 64 | (52692) Johnscalzi | 1998-03-21 | Spacewatch |
| 65 | (85585) Mjolnir | 1998-03-21 | R. A. Tucker |
| 66 | (29837) Savage | 1999-03-21 | P. G. Comba |
| 67 | (91287) Simon-Garfunkel | 1999-03-21 | C. Jacques |
| 68 | (181872) Cathaysa | 1999-03-21 | Sloan Digital Sky Survey |
| 69 | (185744) Hogan | 1999-03-21 | Sloan Digital Sky Survey |
| 70 | (25961) Conti | 2001-03-21 | LONEOS |
| 71 | (25993) Kevinxu | 2001-03-21 | LINEAR |
| 72 | (25994) Lynnelleye | 2001-03-21 | LINEAR |
| 73 | (26011) Cornelius | 2001-03-21 | LONEOS |
| 74 | (26683) Jamesmccarthy | 2001-03-21 | LONEOS |
| 75 | (26693) Katharinecorbin | 2001-03-21 | LONEOS |
| 76 | (46110) Altheamoorhead | 2001-03-21 | LONEOS |
| 77 | (63307) Barbarawilson | 2001-03-21 | Needville |
| 78 | (72596) Zilkha | 2001-03-21 | Dellinger, J., Rivich, K. |
| 79 | (107805) Saibi | 2001-03-21 | A. Nakamura |
| 80 | (249823) Delmarbarker | 2001-03-21 | SKADS |
| 81 | (264474) Rogerclark | 2001-03-21 | SKADS |
| 82 | (370068) Chrisholmberg | 2001-03-21 | SKADS |
| 83 | (455207) Kellyyoder | 2001-03-21 | SKADS |
| 84 | (99581) Egal | 2002-03-21 | LONEOS |
| 85 | (144633) Georgecarroll | 2004-03-21 | Stony Ridge |
| 86 | (263906) Yuanfengfang | 2009-03-21 | Jin, Z.-W., Lin, C.-S. |
| 87 | (316020) Linshuhow | 2009-03-21 | Tsai, Y.-S., Chen, T. |
| 88 | (362177) Anji | 2009-03-21 | T. Chen |
| 89 | (398045) Vitudurum | 2009-03-21 | M. Griesser |
| 90 | (811110) Ubartas | 2015-03-21 | R. P. Boyle K. Äernis |