| Période | Documents | Annexes | Notices |
|---|---|---|---|
| after 2025 | 0 | 0 | 0 |
| 2015 - 2025 | 8666 | 177 | 9559 |
| 2005 - 2015 | 4179 | 67 | 14955 |
| 1995 - 2005 | 1004 | 3 | 3454 |
| 1985 - 1995 | 131 | 0 | 148 |
| 1975 - 1985 | 37 | 0 | 74 |
| 1965 - 1975 | 4 | 0 | 5 |
| 1955 - 1965 | 1 | 0 | 0 |
| 1945 - 1955 | 1 | 0 | 0 |
| 1935 - 1945 | 0 | 0 | 0 |
| 1925 - 1935 | 0 | 0 | 0 |
| 1915 - 1925 | 0 | 0 | 0 |
| 1905 - 1915 | 0 | 0 | 0 |
| before 1905 | 0 | 0 | 0 |
 |
Archive ouverte de l'Observatoire de Paris |  |