The Sky over the Mornington Peninsula — September 2140
Highlights this month
- 4SunMercury at greatest evening elongation (27° from the Sun, mag 0.2) — best evening apparition. (1:32pm)
- 4SunJupiter at opposition — closest and brightest of the year, up all night in Aquarius (mag −2.8). (9:35pm)
- 13TueThe Moon passes Mercury — 1° apart. (9:03pm)
- 17SatThe Moon passes Mars — 2° apart. (4:23pm)
- 17SatMercury is stationary — begins retrograde (westward) motion. (4:57pm)
- 23FriSpring equinox.
- 24SatThe Moon passes Saturn — 5° apart. (6:31am)
- 30FriMercury in inferior conjunction with the Sun — lost in the glare. (8:01pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Thu 1 | 6:42am | 5:59pm | 11h 17m | 7:26pm | 5:14am |
| Sat 10 | 6:28am | 6:06pm | 11h 38m | 7:34pm | 5:01am |
| Tue 20 | 6:13am | 6:15pm | 12h 02m | 7:43pm | 4:44am |
| Fri 30 | 5:57am | 6:24pm | 12h 27m | 7:53pm | 4:27am |
Days lengthen by about 70 minutes over the month.
The Moon
- Last QuarterSun 4, 10:33am
- New MoonSun 11, 5:28pm
- First QuarterMon 19, 8:27pm
- Full MoonTue 27, 2:49am
Perigee 1 Sep (366,300 km) · Apogee 17 Sep (405,400 km) · Perigee 29 Sep (361,000 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Vir | 0.6 | 7:02am | 1:36pm | 8:09pm | Evening |
| Venus | Cnc | −3.8 | 4:45am | 9:56am | 3:07pm | Hidden |
| Mars | Lib | 0.8 | 9:15am | 4:30pm | 11:45pm | Evening |
| Jupiter | Aqr | −2.7 | 5:02pm | 11:32pm | 6:06am | All night |
| Saturn | Cap | 0.3 | 3:38pm | 10:28pm | 5:22am | Evening |
| Uranus | Vir | 5.6 | 7:30am | 1:54pm | 8:18pm | Evening |
| Neptune | Oph | 7.9 | 10:12am | 5:24pm | 12:39am | Evening |
The solar system — September 2140
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 September 2026.