| Authorised form of name | Dionis du Sejour; Achille Pierre (1734 - 1794) |
| Other forms of name | Achille Pierre Dionis du |
| Other forms of surname | Sejour |
| Dates | 1734 - 1794 |
| Nationality | French |
| Place of birth | Paris, France |
| Date of birth | 11 January 1734 |
| Place of death | Vernou, near Fontainebleau, France |
| Date of death | 22 August 1794 |
| Research field | Astronomy |
| Mathematics |
| Demography |
| Membership category | Fellow |
| Date of election | 01/06/1775 |
| Source | Sources:
Bulloch's Roll; DSB |
| Code | NA7211 |
Archives associated with this Fellow
| RefNo | Title | Date |
| EC/1775/18 | Dionis du Sejour, Achille Pierre: certificate of election to the Royal Society | |