The Sky over the Mornington Peninsula — September 2100
Highlights this month
- 1WedThe Moon passes Venus — 5° apart. (1:53pm)
- 6MonThe Moon passes Mercury — 1° apart. (4:15pm)
- 7TueThe Moon passes Jupiter — 5° apart. (2:14pm)
- 10FriNeptune in superior conjunction with the Sun — lost in the glare. (1:50am)
- 14TueMercury at greatest evening elongation (27° from the Sun, mag 0.1) — best evening apparition. (1:43am)
- 19SunJupiter and Saturn in conjunction — 1° apart. (2:43am)
- 23ThuSpring equinox.
- 27MonMercury is stationary — begins retrograde (westward) motion. (2:34am)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Wed 1 | 6:42am | 5:58pm | 11h 16m | 7:26pm | 5:15am |
| Fri 10 | 6:29am | 6:06pm | 11h 37m | 7:34pm | 5:01am |
| Mon 20 | 6:13am | 6:14pm | 12h 01m | 7:43pm | 4:45am |
| Thu 30 | 5:57am | 6:23pm | 12h 26m | 7:53pm | 4:28am |
Days lengthen by about 70 minutes over the month.
The Moon
- New MoonSat 4, 6:53pm
- First QuarterSat 11, 10:33am
- Full MoonSat 18, 9:37pm
- Last QuarterMon 27, 1:36am
Perigee 7 Sep (363,500 km) · Apogee 23 Sep (405,700 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Vir | 0.2 | 7:15am | 1:49pm | 8:24pm | Evening |
| Venus | Cnc | −3.9 | 4:37am | 9:46am | 2:55pm | Hidden |
| Mars | Vir | 1.8 | 6:47am | 12:48pm | 6:50pm | Hidden |
| Jupiter | Vir | −1.5 | 7:47am | 2:16pm | 8:46pm | Evening |
| Saturn | Vir | 0.7 | 7:53am | 2:19pm | 8:46pm | Evening |
| Uranus | Psc | 5.8 | 8:41pm | 2:18am | 7:51am | Morning |
| Neptune | Leo | 8.0 | 6:15am | 11:58am | 5:41pm | Hidden |
The solar system — September 2100
Evening sky Morning sky Up much of the night Lost in the Sun’s glare
Open the full interactive orrery ↗ — fast-forward, pick any date, toggle the Moon and more.
Looking for an earlier month? Browse all past monthly guides →
Generated automatically from the MPAS sky engine on 1 September 2026.