The Sky over the Mornington Peninsula — September 2101
Highlights this month
- 9FriMercury is stationary — begins retrograde (westward) motion. (5:28pm)
- 12MonNeptune in superior conjunction with the Sun — lost in the glare. (1:46pm)
- 13TueVenus and Saturn in conjunction — 4° apart. (1:33pm)
- 23FriMercury in inferior conjunction with the Sun — lost in the glare. (6:33am)
- 23FriSpring equinox.
- 27TueThe Moon passes Venus — 2° apart. (6:25am)
- 28WedVenus and Jupiter in conjunction — 4° apart. (1:59pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Thu 1 | 6:43am | 5:58pm | 11h 15m | 7:26pm | 5:15am |
| Sat 10 | 6:29am | 6:06pm | 11h 37m | 7:33pm | 5:02am |
| Tue 20 | 6:13am | 6:14pm | 12h 01m | 7:42pm | 4:45am |
| Fri 30 | 5:58am | 6:23pm | 12h 25m | 7:53pm | 4:28am |
Days lengthen by about 70 minutes over the month.
The Moon
- First QuarterThu 1, 7:48am
- Full MoonThu 8, 4:23am
- Last QuarterThu 15, 11:00pm
- New MoonFri 23, 5:45pm
- First QuarterFri 30, 1:12pm
Perigee 3 Sep (369,200 km) · Apogee 15 Sep (404,700 km) · Perigee 28 Sep (368,400 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Vir | 2.1 | 6:40am | 1:02pm | 7:24pm | Hidden |
| Venus | Vir | −4.2 | 8:08am | 3:02pm | 9:58pm | Evening |
| Mars | Tau | −0.2 | 12:52am | 5:42am | 10:32am | Morning |
| Jupiter | Lib | −1.6 | 8:55am | 3:52pm | 10:50pm | Evening |
| Saturn | Vir | 0.6 | 8:23am | 3:01pm | 9:40pm | Evening |
| Uranus | Ari | 5.8 | 9:02pm | 2:35am | 8:03am | Morning |
| Neptune | Leo | 8.0 | 6:21am | 12:07pm | 5:53pm | Hidden |
The solar system — September 2101
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 2 September 2026.