ISO week 38 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, September 15, 2025
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Sep 15, 2025 | ♍ 25 | NGC 6939, open cluster in Cep —  V 10.1 — Finest NGC — Northern Summer |
| Tue, Sep 16, 2025 | ♍ 26 | Cygnus center — Constellation —  V 3.5 — Northern SummerC12, NGC 6946, Fireworks Galaxy; Arp 29, spiral galaxy in Cepheus — V 9.7 — Finest NGC — Northern SummerC47, NGC 6934, globular cluster in Delphinus — V 8.9 — Tropical SummerNGC 6940, open cluster in Vul — V 7.2 — Finest NGC — Northern Summer |
| Wed, Sep 17, 2025 | ♍ 27 | Sualocin (α Del) —  V 4 — Tropical SummerRotanev (β Del) — V 4 — Tropical Summerα Ind — V 3 — Southern SummerDelphinus center — Constellation — V 4.2 — Tropical Summer |
| Thu, Sep 18, 2025 | ♍ 28 | Deneb (α Cyg) — V 1 — Northern Summer — in the Milky WayM72, globular cluster in Aquarius — V 9.3 — Tropical Summer |
| Fri, Sep 19, 2025 | ♍ 29 | β Pav — V 3 — Southern SummerAljanah (ε Cyg) — V 2 — Northern SummerM73, asterism in Aquarius — V 9.0 — Tropical SummerC34, NGC 6960, Western Veil Nebula, supernova remnant in Cygnus — Finest NGC — Northern Summer |
| Sat, Sep 20, 2025 | ♍ 30 | α Mic — V 5 — Southern Summer |
| Sun, Sep 21, 2025 | ♍ 31 | 🌑 New Moon — 19:54:08 UTC β Ind — V 4 — Southern Summerβ Mic — V 6 — Southern Summer |
Weekly Solar-System Ephemeris
Snapshot: September 15, 2025 · 00:00 UTC
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♍︎ 22°25′ β +0°00′ | ♊︎ 29°42′ β +5°11′ | ♍︎ 23°47′ β +1°31′ | ♌︎ 24°29′ β +0°46′ | ♎︎ 25°06′ β +0°06′ | ♋︎ 20°14′ β −0°01′ | ♓︎ 29°00′ β −2°30′ |
| Observing | ||||||
| ☉ | | ☉ | | | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♈︎ 13°22′ β −15°04′ | ♊︎ 1°26′ β −0°13′ | ♈︎ 1°00′ β −1°22′ | ♒︎ 1°34′ 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
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.