Asteroids discovered on June 20
17 named asteroids.
| # | Asteroid | Discovered | Discoverer |
|---|---|---|---|
| 1 | (404) Arsinoe | 1895-06-20 | A. Charlois |
| 2 | (876) Scott | 1917-06-20 | J. Palisa |
| 3 | (1817) Katanga | 1939-06-20 | C. Jackson |
| 4 | (2124) Nissen | 1974-06-20 | Felix Aguilar Observatory |
| 5 | (5042) Colpa | 1974-06-20 | Felix Aguilar Observatory |
| 6 | (5261) Eureka | 1990-06-20 | Levy, D. H., Holt, H. E. |
| 7 | (17869) Descamps | 1998-06-20 | ODAS |
| 8 | (18734) Darboux | 1998-06-20 | P. G. Comba |
| 9 | (18032) Geiss | 1999-06-20 | LONEOS |
| 10 | (19578) Kirkdouglas | 1999-06-20 | J. Broughton |
| 11 | (20465) Vervack | 1999-06-20 | LONEOS |
| 12 | (20467) Hibbitts | 1999-06-20 | LONEOS |
| 13 | (40328) Dow | 1999-06-20 | D. Healy |
| 14 | (28990) Ariheinze | 2001-06-20 | LONEOS |
| 15 | (213269) Angelbarbero | 2001-06-20 | Calar Alto |
| 16 | (78115) Skiantonucci | 2002-06-20 | S. F. Hoenig |
| 17 | (230415) Matthiasjung | 2002-06-20 | NEAT |