The Sky over the Mornington Peninsula — December 2100
Highlights this month
- 14TueGeminids meteor shower peaks (up to 150/hr). A bright 94% Moon interferes badly this year.
- 22WedNeptune is stationary — begins retrograde (westward) motion. (11:26am)
- 22WedSummer solstice.
- 22WedUrsids meteor shower peaks (up to 10/hr). A bright 72% Moon interferes badly this year.
- 31FriUranus is stationary — resumes direct (eastward) motion. (1:38pm)
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 | 3:55am |
| 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
- New MoonThu 2, 12:03am
- First QuarterWed 8, 11:13pm
- Full MoonFri 17, 4:02am
- Last QuarterFri 24, 7:51pm
- New MoonFri 31, 10:59am
Perigee 1 Dec (357,700 km) · Apogee 13 Dec (406,000 km) · Perigee 29 Dec (361,600 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Sgr | −0.8 | 6:23am | 1:55pm | 9:28pm | Hidden |
| Venus | Sco | −3.7 | 4:45am | 11:56am | 7:07pm | Hidden |
| Mars | Sco | 1.6 | 4:33am | 11:45am | 6:56pm | Hidden |
| Jupiter | Lib | −1.5 | 3:41am | 10:32am | 5:23pm | Hidden |
| Saturn | Vir | 0.6 | 3:23am | 10:01am | 4:39pm | Morning |
| Uranus | Psc | 5.8 | 3:28pm | 9:05pm | 2:46am | Evening |
| Neptune | Leo | 7.9 | 1:23am | 7:09am | 12:54pm | 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 bright 94% 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 bright 72% Moon interferes badly this year.
The solar system — December 2100
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 2 September 2026.