The Sky over the Mornington Peninsula — December 2141
Highlights this month
- 4MonVenus in inferior conjunction with the Sun — lost in the glare. (2:55am)
- 8FriNeptune in superior conjunction with the Sun — lost in the glare. (9:23pm)
- 10SunJupiter is stationary — resumes direct (eastward) motion. (7:55am)
- 12TueMercury at greatest evening elongation (21° from the Sun, mag −0.5) — best evening apparition. (9:27am)
- 14ThuGeminids meteor shower peaks (up to 150/hr). A bright 99% Moon interferes badly this year.
- 20WedMercury is stationary — begins retrograde (westward) motion. (1:40pm)
- 22FriSummer solstice.
- 22FriUrsids meteor shower peaks (up to 10/hr). A 30% Moon washes out fainter meteors for part of the night.
- 23SatVenus is stationary — resumes direct (eastward) motion. (10:10pm)
- 30SatMercury in inferior conjunction with the Sun — lost in the glare. (2:29am)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Fri 1 | 5:50am | 8:27pm | 14h 37m | 10:20pm | 3:58am |
| Sun 10 | 5:50am | 8:35pm | 14h 46m | 10:30pm | 3:54am |
| Wed 20 | 5:52am | 8:42pm | 14h 50m | 10:39pm | 3:55am |
| Sun 31 | 5:59am | 8:46pm | 14h 47m | 10:42pm | 4:03am |
Days lengthen by about 10 minutes over the month.
The Moon
- First QuarterThu 7, 3:02am
- Full Moon SupermoonThu 14, 1:14am
- Last QuarterWed 20, 5:04pm
- New MoonThu 28, 5:17pm
Apogee 2 Dec (406,000 km) · Perigee 14 Dec (357,300 km) · Apogee 29 Dec (406,300 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Sgr | −0.3 | 7:17am | 2:44pm | 10:10pm | Hidden |
| Venus | Sco | −4.2 | 4:54am | 12:01pm | 7:07pm | Hidden |
| Mars | Vir | 1.4 | 2:34am | 8:54am | 3:15pm | Morning |
| Jupiter | Psc | −2.4 | 2:50pm | 8:38pm | 2:30am | Evening |
| Saturn | Aqr | 0.8 | 11:40am | 6:17pm | 12:58am | Evening |
| Uranus | Vir | 5.6 | 2:57am | 9:33am | 4:09pm | Morning |
| Neptune | Oph | 8.0 | 5:33am | 12:47pm | 8:01pm | 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 bright 99% Moon interferes badly this year.
- 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 2141
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.