ISO week 40 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, September 29, 2025
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Sep 29, 2025 | ♎ 8 | 🌓 First Quarter — 23:53:50 UTC β Equ —  V 5 — Tropical Autumn |
| Tue, Sep 30, 2025 | ♎ 9 | |
| Wed, Oct 1, 2025 | ♎ 10 | Alfirk (β Cep) —  V 3 — Arctic AutumnIndus center — Constellation — V 4.0 — Southern AutumnM15, Great Pegasus Cluster, globular cluster in Pegasus — V 6.2 — Tropical Autumn |
| Thu, Oct 2, 2025 | ♎ 11 | Sadalsuud (β Aqr) — V 3 — Tropical AutumnM2, globular cluster in Aquarius — V 6.5 — Tropical AutumnM39, open cluster in Cygnus — V 4.6 — Northern Autumn |
| Fri, Oct 3, 2025 | ♎ 12 | |
| Sat, Oct 4, 2025 | ♎ 13 | M30, globular cluster in Capricornus — V 7.2 — Tropical Autumn |
| Sun, Oct 5, 2025 | ♎ 14 | Enif (ε Peg) — V 2 — Tropical AutumnNGC 7129, Small Cluster Nebula, reflection nebula in Cep —  V 11.5 — Finest NGC — Northern Autumn |
Weekly Solar-System Ephemeris
Snapshot: September 29, 2025 · 00:00 UTC
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♎︎ 6°07′ β −0°00′ | ♐︎ 25°01′ β −5°13′ | ♎︎ 17°59′ β +0°08′ | ♍︎ 11°37′ β +1°14′ | ♏︎ 4°30′ β −0°03′ | ♋︎ 22°13′ β +0°01′ | ♓︎ 27°55′ β −2°31′ |
| Observing | ||||||
| ☉ | | ☉ | | | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♈︎ 10°25′ β −15°10′ | ♊︎ 1°15′ β −0°13′ | ♈︎ 0°36′ β −1°22′ | ♒︎ 1°25′ 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.
Planet Finder
Sky Notes
Naked eye
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Binoculars
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Telescope
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