ISO week 43 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, October 20, 2025
Notation:
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Oct 20, 2025 | ♎ 29 | |
| Tue, Oct 21, 2025 | ♎ 30 |  Orionids peak · radiant in Orion · expected ZHR ≈ 20 · Moon 0% illuminated: little 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.🌑 New Moon — 12:25:11 UTC Tiaki (β Gru) —  V 2 — Southern AutumnPegasus center — Constellation — V 3.4 — Tropical Autumn |
| Wed, Oct 22, 2025 | ♎ 31 | β Oct —  V 4 — Antarctic Autumn |
| Thu, Oct 23, 2025 | ♏ 1 | ♏ Sun enters Scorpio — 03:50:55 UTC |
| Fri, Oct 24, 2025 | ♏ 2 | |
| Sat, Oct 25, 2025 | ♏ 3 | Fomalhaut (α PsA) — V 1 — Southern AutumnC9, Sh2-155, Cave Nebula, bright nebula in Cepheus —  V 7.7 — Northern Autumn |
| Sun, Oct 26, 2025 | ♏ 4 | Scheat (β Peg) — V 2 — Northern AutumnFumalsamakah (β Psc) — V 4 — Tropical Autumn |
Weekly Solar-System Ephemeris
Snapshot: October 20, 2025 · 00:00 UTC
Notation:
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♎︎ 26°51′ β −0°00′ | ♎︎ 10°07′ β −1°57′ | ♏︎ 18°49′ β −2°14′ | ♎︎ 7°36′ β +1°32′ | ♏︎ 18°59′ β −0°16′ | ♋︎ 24°19′ β +0°04′ | ♓︎ 26°26′ β −2°29′ |
| Observing | ||||||
| ☉ | ☉ | | ☉ | | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♈︎ 5°52′ β −14°28′ | ♊︎ 0°42′ β −0°13′ | ♈︎ 0°03′ β −1°22′ | ♒︎ 1°23′ β −3°47′ |
| 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
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Binoculars
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Telescope
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