Asteroids discovered on August 21
64 named asteroids.
| # | Asteroid | Discovered | Discoverer |
|---|---|---|---|
| 1 | (505) Cava | 1902-08-21 | R. H. Frost |
| 2 | (1285) Julietta | 1933-08-21 | E. Delporte |
| 3 | (1290) Albertine | 1933-08-21 | E. Delporte |
| 4 | (1568) Aisleen | 1946-08-21 | E. L. Johnson |
| 5 | (3654) AAS | 1949-08-21 | Indiana University |
| 6 | (7449) Dollen | 1949-08-21 | K. Reinmuth |
| 7 | (2439) Ulugbek | 1977-08-21 | N. S. Chernykh |
| 8 | (2529) Rockwell Kent | 1977-08-21 | N. S. Chernykh |
| 9 | (2671) Abkhazia | 1977-08-21 | N. S. Chernykh |
| 10 | (3471) Amelin | 1977-08-21 | N. S. Chernykh |
| 11 | (4010) Nikol'skij | 1977-08-21 | N. S. Chernykh |
| 12 | (4391) Balodis | 1977-08-21 | N. S. Chernykh |
| 13 | (4882) Divari | 1977-08-21 | N. S. Chernykh |
| 14 | (7216) Ishkov | 1977-08-21 | N. S. Chernykh |
| 15 | (7976) Pinigin | 1977-08-21 | N. S. Chernykh |
| 16 | (11788) Nauchnyj | 1977-08-21 | N. S. Chernykh |
| 17 | (3102) Krok | 1981-08-21 | L. Brozek |
| 18 | (5250) Jas | 1984-08-21 | A. Mrkos |
| 19 | (7226) Kryl | 1984-08-21 | A. Mrkos |
| 20 | (3328) Interposita | 1985-08-21 | T. Schildknecht |
| 21 | (4038) Kristina | 1987-08-21 | E. W. Elst |
| 22 | (4342) Freud | 1987-08-21 | E. W. Elst |
| 23 | (4405) Otava | 1987-08-21 | A. Mrkos |
| 24 | (5108) Lubeck | 1987-08-21 | E. W. Elst |
| 25 | (6120) Anhalt | 1987-08-21 | F. Borngen |
| 26 | (6595) Munizbarreto | 1987-08-21 | E. W. Elst |
| 27 | (7009) Hume | 1987-08-21 | E. W. Elst |
| 28 | (7400) Lenau | 1987-08-21 | E. W. Elst |
| 29 | (7401) Toynbee | 1987-08-21 | E. W. Elst |
| 30 | (7815) Dolon | 1987-08-21 | E. W. Elst |
| 31 | (9307) Regiomontanus | 1987-08-21 | F. Borngen |
| 32 | (14354) Kolesnikov | 1987-08-21 | E. W. Elst |
| 33 | (48415) Dehio | 1987-08-21 | F. Borngen |
| 34 | (4614) Masamura | 1990-08-21 | Mizuno, Y., Furuta, T. |
| 35 | (10306) Pagnol | 1990-08-21 | E. W. Elst |
| 36 | (27724) Jeannoel | 1990-08-21 | E. W. Elst |
| 37 | (69311) Russ | 1992-08-21 | D. I. Steel |
| 38 | (8895) Nha | 1995-08-21 | K. Watanabe |
| 39 | (11323) Nasu | 1995-08-21 | Endate, K., Watanabe, K. |
| 40 | (24825) Ebeshireiko | 1995-08-21 | Endate, K., Watanabe, K. |
| 41 | (35269) Idefix | 1996-08-21 | Tichy, M., Ticha, J. |
| 42 | (49036) Pelion | 1998-08-21 | Whiteley, R. J., Tholen, D. J. |
| 43 | (70179) Beppechiara | 1999-08-21 | S. Sposetti |
| 44 | (24455) Kanuchova | 2000-08-21 | LONEOS |
| 45 | (32400) Itaparica | 2000-08-21 | LONEOS |
| 46 | (34137) Lonnielinda | 2000-08-21 | C. Wolfe |
| 47 | (36672) Sidi | 2000-08-21 | LONEOS |
| 48 | (155948) Maquet | 2001-08-21 | Pic du Midi |
| 49 | (95955) Claragianni | 2003-08-21 | E. Palomba |
| 50 | (283786) Rutebeuf | 2003-08-21 | Saint-Sulpice |
| 51 | (731124) Rosvick | 2003-08-21 | K. M. Perrett D. D. Balam |
| 52 | (740495) Langill | 2003-08-21 | K. Perrett D. D. Balam |
| 53 | (128602) Careyparish | 2004-08-21 | CSS |
| 54 | (128604) Markfisher | 2004-08-21 | CSS |
| 55 | (128608) Chucklove | 2004-08-21 | CSS |
| 56 | (128614) Juliabest | 2004-08-21 | CSS |
| 57 | (157194) Saddlemyer | 2004-08-21 | D. D. Balam |
| 58 | (197856) Tafelmusik | 2004-08-21 | D. D. Balam |
| 59 | (175437) Zsivotzky | 2006-08-21 | Sarneczky, K., Kuli, Z. |
| 60 | (291921) Rott | 2006-08-21 | C. Rinner |
| 61 | (221908) Agastrophus | 2008-08-21 | P. Kocher |
| 62 | (269232) Tahin | 2008-08-21 | K. Sarneczky |
| 63 | (333639) Yaima | 2008-08-21 | Ishigakijima |
| 64 | (328509) Kostyahrubych | 2009-08-21 | Andrushivka |