ISO week 39 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, September 22, 2025
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Sep 22, 2025 | ♎ 1 | ♎ Sun enters Libra · Autumnal equinox · First Point of Libra · Mabon — 18:19:20 UTC Microscopium center — Constellation —  V 5.5 — Southern AutumnC20, NGC 7000, North America Nebula, bright nebula in Cygnus — V 6.0 — Finest NGC — Northern AutumnC33, NGC 6992/6995, Eastern Veil Nebula, supernova remnant in Cygnus — Finest NGC — Northern Autumn |
| Tue, Sep 23, 2025 | ♎ 2 | Capricornus center — Constellation — V 3.7 — Tropical AutumnC4, NGC 7023, Iris Nebula, bright nebula in Cepheus — V 6.8 — Arctic AutumnC42, NGC 7006, globular cluster in Delphinus —  V 10.6 — Tropical Autumn |
| Wed, Sep 24, 2025 | ♎ 3 | α Oct — V 5 — Antarctic AutumnC55, NGC 7009, Saturn Nebula, planetary nebula in Aquarius — V 8.3 — Finest NGC — Tropical Autumn |
| Thu, Sep 25, 2025 | ♎ 4 | NGC 7027, Magic Carpet, planetary nebula in Cygnus — V 9.6 — Finest NGC — Northern Autumn |
| Fri, Sep 26, 2025 | ♎ 5 | Equuleus center — Constellation — V 4.2 — Tropical Autumn |
| Sat, Sep 27, 2025 | ♎ 6 | Kitalpha (α Equ) — V 4 — Tropical AutumnOctans center — Constellation — V 4.1 — Antarctic Autumn |
| Sun, Sep 28, 2025 | ♎ 7 | Alderamin (α Cep) —  V 2 — Northern Autumn |
Weekly Solar-System Ephemeris
Snapshot: September 22, 2025 · 00:00 UTC
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♍︎ 29°15′ β −0°00′ | ♎︎ 1°11′ β −1°10′ | ♎︎ 6°17′ β +0°54′ | ♍︎ 3°01′ β +1°01′ | ♎︎ 29°47′ β +0°01′ | ♋︎ 21°16′ β +0°00′ | ♓︎ 28°27′ β −2°31′ |
| Observing | ||||||
| ☉ | ☉ | ☉ | | | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♈︎ 11°57′ β −15°10′ | ♊︎ 1°22′ β −0°13′ | ♈︎ 0°48′ β −1°22′ | ♒︎ 1°29′ 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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