December 2026 at a Glance
December 2026 is a month dominated by the Geminid meteor shower and the return of the classic winter constellation landscape. The long December nights — the Winter Solstice on the 21st gives Northern Hemisphere observers 15+ hours of darkness at mid-latitudes — make it the most astronomically productive month of the year for observers who don't mind the cold. Jupiter, in Leo, rises in the mid-to-late evening and brightens steadily ahead of its February 10–11, 2027 opposition, while the Cold Moon — a supermoon — turns full on the evening of December 23 (December 24 UTC).
| Date | Event | Equipment |
|---|---|---|
| Dec 1 | Last Quarter Moon — Moon rises around midnight, evenings dark | Any telescope |
| Dec 4–20 | Geminid shower active — pre-peak building | Naked eye, binoculars |
| Dec 8 | New Moon (Dec 9 UTC) — heart of the month's best deep-sky window | Any telescope |
| Dec 13–14 | Geminid peak — best night of the year for meteors | Naked eye — no equipment needed |
| Dec 21 | Winter Solstice — longest night of 2026 | All targets well-placed, long session opportunity |
| Dec 22 | Ursid meteor shower peak (minor, ~10/hr) | Naked eye toward Ursa Minor |
| Dec 23–24 | Full Moon (Cold Moon, a supermoon) — 8:28 PM EST Dec 23 / 01:28 UTC Dec 24; avoid deep-sky this week | Moon observing, planets |
| All month | Jupiter in Leo, Saturn in Aquarius, Orion prime | 60mm+ telescope |