The Sky over the Mornington Peninsula — December 2115
Highlights this month
- 7SatMercury at greatest evening elongation (21° from the Sun, mag −0.4) — best evening apparition. (12:23pm)
- 14SatGeminids meteor shower peaks (up to 150/hr). A thin 3% Moon leaves the sky dark.
- 16MonMercury is stationary — begins retrograde (westward) motion. (1:09am)
- 18WedVenus and Jupiter in conjunction — 1° apart. (1:26pm)
- 19ThuUranus at opposition — closest and brightest of the year, up all night in Taurus (mag 5.5). (8:45am)
- 19ThuThe Moon passes Jupiter — 5° apart. (10:21pm)
- 20FriThe Moon passes Venus — 3° apart. (1:31am)
- 22SunSummer solstice.
- 22SunUrsids meteor shower peaks (up to 10/hr). A 30% Moon washes out fainter meteors for part of the night.
- 22SunSaturn is stationary — resumes direct (eastward) motion. (9:26pm)
- 25WedMercury in inferior conjunction with the Sun — lost in the glare. (3:22pm)
- 26ThuThe Moon passes Saturn — 0.4° apart. (2:11am)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Sun 1 | 5:51am | 8:26pm | 14h 36m | 10:19pm | 3:59am |
| Tue 10 | 5:50am | 8:35pm | 14h 45m | 10:30pm | 3:55am |
| Fri 20 | 5:52am | 8:42pm | 14h 50m | 10:38pm | 3:55am |
| Tue 31 | 5:58am | 8:46pm | 14h 48m | 10:42pm | 4:02am |
Days lengthen by about 12 minutes over the month.
The Moon
- Full MoonMon 2, 8:43am
- Last QuarterSun 8, 11:55pm
- New MoonMon 16, 2:36pm
- First QuarterTue 24, 7:30pm
- Full Moon SupermoonTue 31, 7:58pm
Perigee 4 Dec (362,100 km) · Apogee 20 Dec (405,900 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Sgr | 0.2 | 7:09am | 2:33pm | 9:57pm | Hidden |
| Venus | Sgr | −3.8 | 8:37am | 3:56pm | 11:14pm | Evening |
| Mars | Lib | 1.6 | 4:17am | 11:23am | 6:30pm | Hidden |
| Jupiter | Cap | −1.8 | 8:57am | 4:06pm | 11:16pm | Evening |
| Saturn | Psc | 0.4 | 3:09pm | 8:56pm | 2:48am | Evening |
| Uranus | Tau | 5.5 | 8:48pm | 1:34am | 6:16am | All night |
| Neptune | Vir | 7.9 | 2:47am | 9:11am | 3:35pm | Morning |
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 3% 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 30% Moon washes out fainter meteors for part of the night.
The solar system — December 2115
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 7 September 2026.