The Sky over the Mornington Peninsula — September 2187
Highlights this month
- 1SatMercury is stationary — begins retrograde (westward) motion. (9:43am)
- 15SatMercury in inferior conjunction with the Sun — lost in the glare. (9:33am)
- 15SatThe Moon passes Jupiter — 4° apart. (6:38pm)
- 20ThuNeptune at opposition — closest and brightest of the year, up all night in Pisces (mag 7.8). (2:41am)
- 23SunSpring equinox.
- 23SunMercury is stationary — resumes direct (eastward) motion. (7:58pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Sat 1 | 6:43am | 5:58pm | 11h 16m | 7:26pm | 5:15am |
| Mon 10 | 6:29am | 6:06pm | 11h 37m | 7:34pm | 5:01am |
| Thu 20 | 6:13am | 6:14pm | 12h 01m | 7:43pm | 4:45am |
| Sun 30 | 5:57am | 6:23pm | 12h 26m | 7:53pm | 4:28am |
Days lengthen by about 70 minutes over the month.
The Moon
- New MoonMon 3, 8:53am
- First QuarterMon 10, 2:49am
- Full MoonTue 18, 5:26am
- Last QuarterWed 26, 1:45am
Perigee 3 Sep (356,700 km) · Apogee 16 Sep (406,200 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Leo | 6.5 | 6:08am | 12:09pm | 6:10pm | Hidden |
| Venus | Vir | −3.7 | 7:18am | 1:35pm | 7:52pm | Hidden |
| Mars | Lib | 0.9 | 9:08am | 4:19pm | 11:31pm | Evening |
| Jupiter | Cap | −2.6 | 3:37pm | 10:27pm | 5:21am | Evening |
| Saturn | Vir | 0.8 | 7:20am | 1:30pm | 7:40pm | Hidden |
| Uranus | Ari | 5.7 | 9:49pm | 3:10am | 8:28am | Morning |
| Neptune | Psc | 7.8 | 6:23pm | 12:36am | 6:45am | All night |
The solar system — September 2187
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 15 October 2026.