| 2 September | Pallas in opposition |
| 9 September | Uranus in opposition |
| 11 September, 12:44 | New moon and partial solar eclipse |
| 22 September | Mercury 0.09° north of Spica |
| 23 September, 09:51 | September equinox |
| 26 September, 19:45 | Full moon |
| 27 September | Mercury at greatest eastern elongation (26°) |