The Sky over the Mornington Peninsula — September 2099
Highlights this month
- 7MonNeptune in superior conjunction with the Sun — lost in the glare. (1:47pm)
- 14MonMars is stationary — begins retrograde (westward) motion. (3:27am)
- 16WedThe Moon passes Mercury — 0.7° apart. (4:32pm)
- 23WedSpring equinox.
- 26SatJupiter in superior conjunction with the Sun — lost in the glare. (8:36pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Tue 1 | 6:42am | 5:58pm | 11h 16m | 7:26pm | 5:14am |
| Thu 10 | 6:28am | 6:06pm | 11h 38m | 7:34pm | 5:01am |
| Sun 20 | 6:13am | 6:15pm | 12h 02m | 7:43pm | 4:45am |
| Wed 30 | 5:57am | 6:23pm | 12h 27m | 7:53pm | 4:28am |
Days lengthen by about 70 minutes over the month.
The Moon
- Last QuarterTue 8, 7:25am
- New MoonTue 15, 2:56am
- First QuarterMon 21, 7:43pm
- Full MoonTue 29, 8:51pm
Apogee 2 Sep (406,200 km) · Perigee 15 Sep (356,700 km) · Apogee 29 Sep (406,200 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Vir | −0.2 | 7:11am | 1:34pm | 7:58pm | Evening |
| Venus | Vir | −3.7 | 7:03am | 1:12pm | 7:21pm | Hidden |
| Mars | Ari | −2.0 | 9:12pm | 2:51am | 8:25am | Morning |
| Jupiter | Vir | −1.5 | 6:48am | 12:49pm | 6:49pm | Hidden |
| Saturn | Vir | 0.8 | 7:25am | 1:38pm | 7:51pm | Hidden |
| Uranus | Psc | 5.8 | 8:19pm | 2:02am | 7:40am | Morning |
| Neptune | Leo | 8.0 | 6:08am | 11:49am | 5:30pm | Hidden |
The solar system — September 2099
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.