ISO week 50 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, December 8, 2025
Notation:
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Dec 8, 2025 | ♐ 17 | α Hyi —  V 3 — Southern AutumnC28, NGC 752, open cluster in Andromeda —  V 5.7 — Northern AutumnNGC 772, galaxy in Aries —  V 10.6 — Finest NGC — Tropical Autumn |
| Tue, Dec 9, 2025 | ♐ 18 | Alrescha (α Psc) — V 4 — Tropical AutumnAlmach (Gam-1) — V 2 — Northern Autumn |
| Wed, Dec 10, 2025 | ♐ 19 | Hamal (α Ari) — V 2 — Northern Autumnβ Tri — V 3 — Northern AutumnTriangulum center — Constellation — V 3.4 — Northern Autumn |
| Thu, Dec 11, 2025 | ♐ 20 | 🌗 Last Quarter — 20:51:42 UTC |
| Fri, Dec 12, 2025 | ♐ 21 | |
| Sat, Dec 13, 2025 | ♐ 22 |  Geminids peak · radiant in Gemini · expected ZHR ≈ 150 · Moon 30% illuminated: moderate moonlight interference · Use a dark site, allow 20–30 minutes for dark adaptation, and observe with the unaided eye. Watch a broad area of sky rather than staring directly at the radiant.Hydrus center — Constellation — V 2.9 — Antarctic AutumnC14, NGC 869/884, Double Cluster, open cluster in Perseus — V 4.3 — Finest NGC — Northern AutumnC23, NGC 891, Silver Needle, spiral galaxy in Andromeda — V 9.9 — Finest NGC — Northern Autumn |
| Sun, Dec 14, 2025 | ♐ 23 | NGC 936, galaxy in Cetus — V 11.2 — Finest NGC — Tropical Autumn |
Weekly Solar-System Ephemeris
Snapshot: December 8, 2025 · 00:00 UTC
Notation:
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♐︎ 16°08′ β +0°00′ | ♋︎ 28°20′ β +3°33′ | ♏︎ 25°32′ β +2°19′ | ♐︎ 9°00′ β +0°26′ | ♐︎ 24°30′ β −0°43′ | ♋︎ 24°01′ β +0°11′ | ♓︎ 25°15′ β −2°21′ |
| Observing | ||||||
| ☉ | | | ☉ | ☉ | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♈︎ 3°18′ β −10°40′ | ♉︎ 28°46′ β −0°12′ | ♓︎ 29°22′ β −1°21′ | ♒︎ 2°04′ β −3°46′ |
| Observing | |||
| | | |
β = ecliptic latitude (+ north, − south). Observing combines visual magnitude with solar elongation. Two telescope glyphs = substantial telescope. ☉ = Near Sun — not currently observable.
Notation:
Planet Finder
Sky Notes
Naked eye
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Binoculars
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Telescope
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.