The Sky over the Mornington Peninsula — December 2138
Highlights this month
- 2TueVenus at greatest morning elongation (47° from the Sun, mag −4.4) — best morning apparition. (2:03pm)
- 2TueNeptune in superior conjunction with the Sun — lost in the glare. (5:15pm)
- 6SatThe Moon passes Saturn — 0.8° apart. (3:53pm)
- 14SunGeminids meteor shower peaks (up to 150/hr). A bright 94% Moon interferes badly this year.
- 22MonSummer solstice.
- 22MonUrsids meteor shower peaks (up to 10/hr). A bright 71% Moon interferes badly this year.
- 30TueMercury in superior conjunction with the Sun — lost in the glare. (3:51am)
Sun & twilight
| Date | Sunrise | Sunset | Day length | Astro. dark begins | ends |
|---|---|---|---|---|---|
| Mon 1 | 5:50am | 8:27pm | 14h 36m | 10:19pm | 3:58am |
| Wed 10 | 5:50am | 8:35pm | 14h 45m | 10:30pm | 3:55am |
| Sat 20 | 5:52am | 8:42pm | 14h 50m | 10:39pm | 3:55am |
| Wed 31 | 5:59am | 8:46pm | 14h 47m | 10:42pm | 4:03am |
Days lengthen by about 11 minutes over the month.
The Moon
- New MoonTue 2, 9:43pm
- First QuarterTue 9, 7:15pm
- Full MoonTue 16, 9:47pm
- Last QuarterWed 24, 11:45pm
Perigee 7 Dec (369,000 km) · Apogee 23 Dec (405,000 km)
The planets
Rise/set for mid-month at The Briars.
| Planet | In | Mag | Rise | Transit | Set | Best |
|---|---|---|---|---|---|---|
| Mercury | Oph | −0.8 | 5:18am | 12:39pm | 8:01pm | Hidden |
| Venus | Vir | −4.3 | 3:27am | 10:06am | 4:46pm | Morning |
| Mars | Sgr | 1.2 | 7:48am | 3:10pm | 10:32pm | Hidden |
| Jupiter | Sgr | −1.7 | 7:24am | 2:44pm | 10:04pm | Hidden |
| Saturn | Cap | 0.5 | 9:00am | 4:08pm | 11:17pm | Evening |
| Uranus | Vir | 5.5 | 2:24am | 8:43am | 3:02pm | Morning |
| Neptune | Oph | 8.0 | 5:11am | 12:21pm | 7:32pm | 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 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 71% Moon interferes badly this year.
The solar system — December 2138
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.
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Generated automatically from the MPAS sky engine on 14 September 2026.