The Sky over the Mornington Peninsula — December 2145
Highlights this month
- 7TueThe Moon passes Jupiter — 3° apart. (11:48am)
- 14TueGeminids meteor shower peaks (up to 150/hr). A thin 0% Moon leaves the sky dark.
- 17FriNeptune in superior conjunction with the Sun — lost in the glare. (10:42am)
- 21TueMercury in superior conjunction with the Sun — lost in the glare. (12:16am)
- 22WedSummer solstice.
- 22WedUrsids meteor shower peaks (up to 10/hr). A bright 62% Moon interferes badly this year.
- 23ThuThe Moon passes Saturn — 0.6° apart. (2:04pm)
- 26SunJupiter is stationary — begins retrograde (westward) motion. (9:18pm)
- 29WedSaturn is stationary — resumes direct (eastward) motion. (12:07pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Wed 1 | 5:50am | 8:27pm | 14h 37m | 10:20pm | 3:58am |
| Fri 10 | 5:50am | 8:35pm | 14h 46m | 10:31pm | 3:54am |
| Mon 20 | 5:52am | 8:42pm | 14h 50m | 10:39pm | 3:55am |
| Fri 31 | 5:59am | 8:46pm | 14h 47m | 10:42pm | 4:03am |
Days lengthen by about 10 minutes over the month.
The Moon
- Last QuarterTue 7, 10:17pm
- New MoonTue 14, 4:53pm
- First QuarterTue 21, 11:21am
- Full MoonWed 29, 2:42pm
Apogee 1 Dec (406,200 km) · Perigee 14 Dec (356,700 km) · Apogee 28 Dec (406,200 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Oph | −1.0 | 5:35am | 1:01pm | 8:28pm | Hidden |
| Venus | Sgr | −3.8 | 6:06am | 1:30pm | 8:55pm | Hidden |
| Mars | Lib | 1.7 | 3:45am | 10:40am | 5:36pm | Hidden |
| Jupiter | Leo | −1.9 | 12:59am | 6:33am | 12:07pm | Morning |
| Saturn | Psc | 0.3 | 3:44pm | 9:22pm | 3:04am | Evening |
| Uranus | Lib | 5.6 | 3:46am | 10:42am | 5:38pm | Hidden |
| Neptune | Oph | 8.0 | 6:06am | 1:23pm | 8:39pm | Hidden |
Meteor showers
- Geminids — peaks 14 December, radiant in Gemini (up to 150/hr). The richest shower of the year; the radiant reaches a useful altitude after local midnight, so it rewards southern observers well. A thin 0% Moon leaves the sky dark.
- Ursids — peaks 22 December, radiant in Ursa Minor (up to 10/hr). A circumpolar northern shower whose radiant never rises from Victoria. A bright 62% Moon interferes badly this year.
The solar system — December 2145
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 17 September 2026.