The Sky over the Mornington Peninsula — December 2120
Highlights this month
- 7SatThe Moon passes Saturn — 4° apart. (1:01am)
- 9MonThe Moon passes Jupiter — 0.2° apart. (5:39am)
- 11WedThe Moon passes Mars — 5° apart. (4:00pm)
- 13FriVenus at greatest evening elongation (47° from the Sun, mag −4.4) — best evening apparition. (9:09pm)
- 14SatGeminids meteor shower peaks (up to 150/hr). A 40% Moon washes out fainter meteors for part of the night.
- 22SunSummer solstice.
- 22SunUrsids meteor shower peaks (up to 10/hr). A thin 4% Moon leaves the sky dark.
- 22SunSaturn at opposition — closest and brightest of the year, up all night in Gemini (mag −0.6). (1:52pm)
- 24TueThe Moon passes Venus — 3° apart. (12:13pm)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Sun 1 | 5:50am | 8:27pm | 14h 37m | 10:20pm | 3:58am |
| Tue 10 | 5:50am | 8:35pm | 14h 46m | 10:31pm | 3:54am |
| Fri 20 | 5:52am | 8:42pm | 14h 50m | 10:39pm | 3:55am |
| Tue 31 | 5:59am | 8:46pm | 14h 47m | 10:42pm | 4:03am |
Days lengthen by about 10 minutes over the month.
The Moon
- Full MoonThu 5, 1:29pm
- Last QuarterFri 13, 3:56pm
- New MoonSat 21, 2:03am
- First QuarterFri 27, 6:45pm
Apogee 11 Dec (405,100 km) · Perigee 23 Dec (363,400 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Sgr | −0.7 | 6:36am | 2:09pm | 9:41pm | Hidden |
| Venus | Cap | −4.5 | 9:29am | 4:38pm | 11:47pm | Evening |
| Mars | Leo | −0.0 | 12:38am | 5:53am | 11:08am | Morning |
| Jupiter | Cnc | −2.4 | 10:50pm | 3:47am | 8:40am | Morning |
| Saturn | Gem | −0.6 | 8:59pm | 1:50am | 6:37am | All night |
| Uranus | Gem | 5.5 | 10:21pm | 3:11am | 7:58am | Morning |
| Neptune | Vir | 8.0 | 3:12am | 9:48am | 4:24pm | 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 40% 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 4% Moon leaves the sky dark.
The solar system — December 2120
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 9 September 2026.