The Sky over the Mornington Peninsula — September 2031
Highlights this month
- 1MonVenus is stationary — resumes direct (eastward) motion. (7:33am)
- 9TueThe Moon passes Saturn — 1° apart. (3:19pm)
- 13SatThe Moon passes Venus — 0.3° apart. (8:35pm)
- 23TueSpring equinox.
- 23TueThe Moon passes Mars — 4° apart. (12:37pm)
- 23TueThe Moon passes Jupiter — 2° apart. (6:40pm)
- 24WedMercury in superior conjunction with the Sun — lost in the glare. (11:16am)
- 29MonMars and Jupiter in conjunction — 2° apart. (11:37am)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Mon 1 | 6:43am | 5:58pm | 11h 15m | 7:26pm | 5:15am |
| Wed 10 | 6:29am | 6:06pm | 11h 36m | 7:33pm | 5:02am |
| Sat 20 | 6:13am | 6:14pm | 12h 01m | 7:42pm | 4:45am |
| Tue 30 | 5:58am | 6:23pm | 12h 25m | 7:52pm | 4:28am |
Days lengthen by about 70 minutes over the month.
The Moon
- Full MoonMon 1, 7:20pm
- Last QuarterTue 9, 2:22am
- New MoonWed 17, 4:50am
- First QuarterWed 24, 11:19am
Apogee 11 Sep (405,300 km) · Perigee 27 Sep (367,300 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Leo | −1.5 | 6:11am | 11:49am | 5:28pm | Hidden |
| Venus | Cnc | −4.6 | 4:17am | 9:41am | 3:05pm | Morning |
| Mars | Oph | 0.3 | 10:01am | 5:28pm | 12:56am | Evening |
| Jupiter | Oph | −1.9 | 10:42am | 6:02pm | 1:26am | Evening |
| Saturn | Tau | −0.1 | 1:24am | 6:14am | 11:03am | Morning |
| Uranus | Tau | 5.7 | 1:51am | 6:33am | 11:15am | Morning |
| Neptune | Psc | 7.8 | 7:51pm | 1:43am | 7:31am | Morning |
The solar system — September 2031
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 July 2026.