The Sky over the Mornington Peninsula — December 2131
Highlights this month
- 6ThuThe Moon passes Jupiter — 0.0° apart. (12:43am)
- 6ThuMars is stationary — resumes direct (eastward) motion. (3:32am)
- 14FriGeminids meteor shower peaks (up to 150/hr). A 25% Moon washes out fainter meteors for part of the night.
- 18TueJupiter at opposition — closest and brightest of the year, up all night in Taurus (mag −2.6). (8:29pm)
- 18TueUranus is stationary — begins retrograde (westward) motion. (8:57pm)
- 22SatSummer solstice.
- 22SatUrsids meteor shower peaks (up to 10/hr). A thin 6% Moon leaves the sky dark.
- 23SunThe Moon passes Venus — 1° apart. (3:39pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Sat 1 | 5:51am | 8:27pm | 14h 36m | 10:19pm | 3:59am |
| Mon 10 | 5:50am | 8:35pm | 14h 45m | 10:30pm | 3:55am |
| Thu 20 | 5:52am | 8:42pm | 14h 50m | 10:38pm | 3:55am |
| Mon 31 | 5:58am | 8:46pm | 14h 48m | 10:42pm | 4:02am |
Days lengthen by about 11 minutes over the month.
The Moon
- Full Moon SupermoonTue 4, 11:30pm
- Last QuarterTue 11, 10:51pm
- New MoonThu 20, 3:58am
- First QuarterThu 27, 7:19pm
Perigee 4 Dec (357,800 km) · Apogee 16 Dec (405,900 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Oph | −0.7 | 5:03am | 12:19pm | 7:36pm | Hidden |
| Venus | Cap | −3.9 | 8:42am | 4:00pm | 11:17pm | Evening |
| Mars | Ari | −1.1 | 4:32pm | 9:50pm | 3:12am | Evening |
| Jupiter | Tau | −2.6 | 8:44pm | 1:33am | 6:18am | All night |
| Saturn | Lib | 0.4 | 4:14am | 11:09am | 6:05pm | Hidden |
| Uranus | Leo | 5.5 | 1:06am | 6:44am | 12:21pm | Morning |
| Neptune | Lib | 8.0 | 4:22am | 11:22am | 6:22pm | 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 25% Moon washes out fainter meteors for part of the night.
- Ursids — peaks 22 December, radiant in Ursa Minor (up to 10/hr). A circumpolar northern shower whose radiant never rises from Victoria. A thin 6% Moon leaves the sky dark.
The solar system — December 2131
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 13 September 2026.