| 1 | A | B | C |
| --- | --- | --- | --- |
| 2 | Raymond Smith Dugan |  |  |
| 3 | 497 Iva | 4 November 1902 | list |
| 4 | 503 Evelyn | 19 January 1903 | list |
| 5 | 506 Marion | 17 February 1903 | list |
| 6 | 507 Laodica | 19 February 1903 | list |
| 7 | 508 Princetonia | 20 April 1903 | list |
| 8 | 510 Mabella | 20 May 1903 | list |
| 9 | 511 Davida | 30 May 1903 | list |
| 10 | 516 Amherstia | 20 September 1903 | list |
| 11 | 517 Edith | 22 September 1903 | list |
| 12 | 518 Halawe | 20 October 1903 | list |
| 13 | 519 Sylvania | 20 October 1903 | list |
| 14 | 521 Brixia | 10 January 1904 | list |
| 15 | 523 Ada | 27 January 1904 | list |
| 16 | 533 Sara | 19 April 1904 | list |
| 17 | 534 Nassovia | 19 April 1904 | list |
| 18 | 535 Montague | 7 May 1904 | list |

Question: How many asteroids did Dugan discover?
Answer: Dugan discovered 16 asteroids between 1902 and 1904, including 511 Davida.